WEBVTT - From the Vault: The Parrotfish, Part 1

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<v Speaker 1>Hey, you welcome to Stuff to Blow your Mind. This

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<v Speaker 1>is Robert Lamb. Today's Saturday, so of course we have

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<v Speaker 1>a vault episode for you. This is going to be

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<v Speaker 1>the Parrotfish Part one. It originally published five twenty one,

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<v Speaker 1>twenty twenty four. I hope you enjoy.

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<v Speaker 2>Welcome to Stuff to Blow Your Mind production of iHeartRadio.

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<v Speaker 1>Hey you welcome to Stuff to Blow your Mind.

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<v Speaker 3>My name is Robert Lamb and I am Joe McCormick.

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<v Speaker 3>And today on the podcast we're going to be beginning

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<v Speaker 3>a look at parrotfish or parrotfishes. This is one of

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<v Speaker 3>those topics that literally just started with me looking at

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<v Speaker 3>a picture. I was staring at a picture of a

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<v Speaker 3>bizarre goofy, goofy appearing animal and thinking I want to

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<v Speaker 3>know more about this critter, and then discovering that indeed,

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<v Speaker 3>this organ is a is a peculiar and fascinating story,

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<v Speaker 3>and there is so much more to it than you

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<v Speaker 3>might guess just by looking at it at its strange

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<v Speaker 3>beak or toothy mouth.

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<v Speaker 1>Yeah, parrotfish are pretty fascinating. I've snorkeled among the parrotfish

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<v Speaker 1>many times and can attest that they're curious looking fish.

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<v Speaker 1>They're pleasure to watch. They're often very colorful. So I'm

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<v Speaker 1>going to throw in more of my observations as we proceed.

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<v Speaker 1>But I think, on the other hand, in coral reef environments,

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<v Speaker 1>where I've done most of my snorkeling, and where a

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<v Speaker 1>lot of snorkeling takes place, they can actually be easy

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<v Speaker 1>to take for granted because they're generally around and you

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<v Speaker 1>know significant numbers that these environments. Often these are protected

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<v Speaker 1>reefs that I've been to, they're not particularly shy, they're

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<v Speaker 1>easily found in shallow water, so you know, oftentimes you're

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<v Speaker 1>dealing with like reef environments that are either very accessible

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<v Speaker 1>just from the shore or just a very short boat

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<v Speaker 1>ride sort of a situation. So in a way, it's

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<v Speaker 1>easy to take them for granted because they're there, you

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<v Speaker 1>see them, and then you end up focusing a lot

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<v Speaker 1>more of your attention looking for some of the harder

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<v Speaker 1>to find organisms that are going to live in these

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<v Speaker 1>reef environments. So it's actually a great opportunity to stop

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<v Speaker 1>and focus on this remarkable fish that I honestly had

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<v Speaker 1>never really thought about devoting a whole episode or series

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<v Speaker 1>of episodes too. But there's more than enough to talk about.

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<v Speaker 3>I've never snorkeled and seen them in person, so I'm

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<v Speaker 3>envious of this experience and maybe I will someday. I

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<v Speaker 3>look forward to that. But I've seen video and in

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<v Speaker 3>some cases that there's almost a feeling of like bees

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<v Speaker 3>buzzing around a shrub that's covered in flowers. You know,

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<v Speaker 3>it's just kind of the general gentle grazing activity of

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<v Speaker 3>some animals surrounding a plant like structure, but in this

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<v Speaker 3>case it's of the big skeleton of stony corals.

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<v Speaker 1>Yeah, the grazing observation is key, and it's something that

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<v Speaker 1>has long been observed for these creatures, as we'll discuss

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<v Speaker 1>going back into ancient times, even when we didn't have

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<v Speaker 1>snorkelers as we think of them today, you still had

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<v Speaker 1>individuals fishing in shallow environments, sometimes fishing for the parrotfish

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<v Speaker 1>in question, and observing that, Hey, these creatures appear to

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<v Speaker 1>be grazing, unlike most of the fish that we are observing.

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<v Speaker 3>So parrotfish are not one species, but a larger group

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<v Speaker 3>of fish containing about ninety something individual species. I've seen

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<v Speaker 3>different estimates on the numbers. I think it's older ones

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<v Speaker 3>that say, maybe like eighty species. Others say closer to

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<v Speaker 3>one hundred, but I think ninety something is about right.

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<v Speaker 3>They range broadly in terms of size and appearance. In fact,

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<v Speaker 3>they range broadly in terms of appearance even within a species,

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<v Speaker 3>as we'll get to maybe in this part or maybe later,

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<v Speaker 3>but some adult parrotfish are less than a foot in length,

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<v Speaker 3>and some of the largest are almost four feet or

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<v Speaker 3>about one point two meters in length, so they can

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<v Speaker 3>range from medium small to quite large. These fish are

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<v Speaker 3>sometimes taxonomized as a family called scarid and in other

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<v Speaker 3>cases regarded as a subfamily of Labridy, which are commonly

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<v Speaker 3>known as the rasses. I think you can see some

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<v Speaker 3>morphological similarities with the fish called rasses, kind of the

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<v Speaker 3>way they swim, the way they use their pectoral fins,

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<v Speaker 3>and stuff like that. But a characteristic come into many

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<v Speaker 3>parrotfishes is that they tend to live around coral reefs,

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<v Speaker 3>especially in the tropics.

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<v Speaker 1>I also want to throw in there that there are

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<v Speaker 1>occasionally fish that are just sort of commonly called a

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<v Speaker 1>parrotfish or informally called a parrotfish, that are not parrotfish,

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<v Speaker 1>mainly the blood red parrot chick lid, which apparently is

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<v Speaker 1>a popular aquarium species.

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<v Speaker 3>This is not.

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<v Speaker 1>Actually related to proper parrotfish that we're going to be

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<v Speaker 1>talking about here today. And I've also seen some some

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<v Speaker 1>fossil evidence that is sometimes categorized as a parrotfish in

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<v Speaker 1>a way that I'm not sure actually lines up with

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<v Speaker 1>what we're talking about here. But if you've seen a

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<v Speaker 1>picture of a parrotfish proper parrotfish, indeed, go ahead and

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<v Speaker 1>look one up if you're in a position to do so.

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<v Speaker 1>I think it's hard to miss what we're talking about.

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<v Speaker 1>These are very recognizable fish, though again they do very

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<v Speaker 1>greatly in coloration.

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<v Speaker 3>Size, that's right. Yeah, So if you look up pictures

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<v Speaker 3>of them, you'll see that they're often kind of elongated

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<v Speaker 3>in body. They have different shapes. Some are more kind

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<v Speaker 3>of that elongated oval shape and others are blunter in

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<v Speaker 3>the front with like blunt heads. They're in fact, our

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<v Speaker 3>parrotfish called like the blunt head pair of parrotfish or

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<v Speaker 3>the steep head parrotfish. The coloration you'll see on them

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<v Speaker 3>depends on some facts about them and not just their species,

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<v Speaker 3>but sometimes they have quite bright patterns of almost neon color,

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<v Speaker 3>surprising colors to see in nature. Very you know, tropical

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<v Speaker 3>kind of color signals. There's one picture I kept seeing

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<v Speaker 3>where the fish had a color pattern that reminded me

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<v Speaker 3>of the as design from paper cups in the nineties.

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<v Speaker 3>But if you also threw some hot pink in there.

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<v Speaker 3>So there's a lot to take in when you look

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<v Speaker 3>at look at a parrot fish. But before you notice

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<v Speaker 3>any of that, but you know, the head shape, the

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<v Speaker 3>body shape, the coloration patterns, what you will probably notice

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<v Speaker 3>first about any given parrotfish is the mouth. I mean,

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<v Speaker 3>look at these chompers. Rob I've included just several pictures.

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<v Speaker 3>I know you've seen them in person, so your experience

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<v Speaker 3>of the teeth the beak is probably more direct and

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<v Speaker 3>visceral and profound even than mine. But I was just

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<v Speaker 3>looking at these pictures for quite a while the other day,

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<v Speaker 3>and my God, that these beaks, these mouths, it's it's incredible.

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<v Speaker 1>Yeah, Yeah, their mouths are quite fascinating in some of

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<v Speaker 1>the photos. Yeah, they can actually look a little intimidating, though,

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<v Speaker 1>I would say based on the species that I've primarily

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<v Speaker 1>been exposed to in Hawaii and the Caribbean, they tend

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<v Speaker 1>to look more silly then than threatening. But they're definitely

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<v Speaker 1>very cool looking, not taking anything away from that.

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<v Speaker 3>Yeah, So I guess it varies from species to species.

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<v Speaker 3>So parrotfish have these rows of fused teeth on the

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<v Speaker 3>outside of their jaws, which, in some cases, as the

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<v Speaker 3>name implies, look very similar to the beak of a parrot.

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<v Speaker 3>It can look like a bird's beak, But in other cases,

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<v Speaker 3>these fused rows of teeth look like jagged monster jaws,

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<v Speaker 3>sort of like a horseshoe shaped ceramic saw blade. But

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<v Speaker 3>in other cases still they are like a big goofy

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<v Speaker 3>cartoon overbite, like Alfred Y Newman's mouth got hit with

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<v Speaker 3>the radiation from the amazing Colossal Man.

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<v Speaker 1>Now I want to throw in one more note here

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<v Speaker 1>about species classifications coloration. It is worth noting that with

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<v Speaker 1>parrotfish that classifications in naming have long proof challenging because

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<v Speaker 1>they tend to show different colorizations depending on an individual's

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<v Speaker 1>age and sex. So, for example, was pointed out by

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<v Speaker 1>the Waikiki Aquarium, the spectacled parrotfish is reddish brown when

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<v Speaker 1>it's a juvenile, then it develops a pale tail spot

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<v Speaker 1>when it becomes a reproductive female, and then develops bright

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<v Speaker 1>blue green coloration. With pink markings when it becomes male.

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<v Speaker 1>So you can imagine a lot of the early confusion

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<v Speaker 1>at figuring out, well, what is a different species of parrotfish,

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<v Speaker 1>and you will have multiple species of parrotfish in a

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<v Speaker 1>given region, and then what is just parrotfish are the

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<v Speaker 1>same species that's just in a different phase of its

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<v Speaker 1>life cycle.

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<v Speaker 3>That's right. In fact, I was even reading like some

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<v Speaker 3>blog posts by marine biologists who had worked with these

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<v Speaker 3>animals firsthand, talking about just how difficult it was sometimes

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<v Speaker 3>to identify these fish because of all the variation even

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<v Speaker 3>within species. But to come back to the main attraction,

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<v Speaker 3>the teeth, the beaks. The crazy thing is, as much

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<v Speaker 3>as these look like biting teeth in some cases, in

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<v Speaker 3>reality they are scraping teeth. Because parrotfish are primarily herbivores

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<v Speaker 3>for the most part, they do not eat by swimming

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<v Speaker 3>around biting semi circular chunks out of other fish, as

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<v Speaker 3>you might imagine just looking at their mouths. They mostly

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<v Speaker 3>eat by grazing along the hard surfaces of coral reefs,

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<v Speaker 3>scraping away algae and soft bits of coral and other

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<v Speaker 3>bits of organic matter, along with some hard bits of

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<v Speaker 3>the coral skeletons with their teeth, So that's what the

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<v Speaker 3>teeth are for. These are for grazing. These are the

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<v Speaker 3>life of a herbivore, not the life of a predator.

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<v Speaker 1>Now, of course, as this we'll be discussing here. Coral,

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<v Speaker 1>of course is hard matter. And one of the crazy

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<v Speaker 1>things about snorkeling with parrotfish is that you don't just

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<v Speaker 1>get to watch them, you get to listen to them.

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<v Speaker 1>So as they feast on the algae that's growing on

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<v Speaker 1>the coral, they're scraping the coral, and it's producing a

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<v Speaker 1>sound in the snorkeler's ear that I would compare to

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<v Speaker 1>kind of a static paper crunching or even the snap

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<v Speaker 1>crackle crunch of rice crispies and milk. It's one of

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<v Speaker 1>those things when when you first explore. When I first

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<v Speaker 1>experienced it, I wasn't exactly sure what I was listening to,

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<v Speaker 1>because it's kind of like, oh, is there something in

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<v Speaker 1>my ears and it's just just the sound of the

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<v Speaker 1>ocean and so forth. But no, it it becomes clear,

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<v Speaker 1>and it's often pointed out to one that yeah, this

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<v Speaker 1>is the sound of these the parrotfish feeding, and yeah,

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<v Speaker 1>it's pretty remarkable. So you listen to them, you watch them,

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<v Speaker 1>and they just become part of the background sound escape

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<v Speaker 1>to your snortling.

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<v Speaker 3>It's a funny other comparison to bees, almost, you know,

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<v Speaker 3>the way the buzzing of a bee just kind of

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<v Speaker 3>like blends in becomes the ambient sound of a landscape.

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<v Speaker 3>The tooth and beak scraping on coral sound produced by

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<v Speaker 3>these animals is maybe comparable to the buzzing of bees.

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<v Speaker 1>Yeah, and it's also consistent, like that's the other thing.

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<v Speaker 1>They're constantly grazing, and therefore it is a constant soundtrack.

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<v Speaker 1>It's not like say, the occasional sound of a woodpecker

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<v Speaker 1>in a forest, Like it's just NonStop. So it's just

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<v Speaker 1>in the background, and you could easily if you didn't

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<v Speaker 1>know what you were listening to, you might not realize

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<v Speaker 1>that this is the sound of organisms feeding.

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<v Speaker 3>Now, I think there are probably other people out there

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<v Speaker 3>like me, Rob, I don't know if you fall into

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<v Speaker 3>this category of people whose minds are easily captured and

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<v Speaker 3>revolted by just imagining kind of tooth trauma. Like I

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<v Speaker 3>very easily can like get a shiver across my whole

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<v Speaker 3>body when I imagine, say, trying to bite down on

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<v Speaker 3>a rock, And that is what you have to constantly

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<v Speaker 3>imagine when you're thinking about these animals. It's not technically

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<v Speaker 3>a rock, though I guess in some cases they do

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<v Speaker 3>scrape rocks as well, but most often it's going to

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<v Speaker 3>be like a rock. It will be the skeletons of

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<v Speaker 3>stony corals. But can you just imagine that, as painful

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<v Speaker 3>as it might be, imagine having to live by like seeing,

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<v Speaker 3>you know, a moss covered rock and thinking I'm going

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<v Speaker 3>to use my front teeth to scrape that bad boy clean,

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<v Speaker 3>and I'm going to bite off some chunks of the

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<v Speaker 3>rock as I'm getting the moss off of it. Delicious.

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<v Speaker 1>Yeah, yeah, it can be a bit squeamish. It can

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<v Speaker 1>make one a bit squamish sometimes imagining these other dental

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<v Speaker 1>scenarios in the natural world.

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<v Speaker 3>So I want to talk a bit more later about

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<v Speaker 3>how parrotfish eat and get their nutrition, and a bit

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<v Speaker 3>more about their teeth. But before we do that, Rob,

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<v Speaker 3>I think you've found some interesting stuff about writings on

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<v Speaker 3>parrotfish from the ancient world. Yeah.

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<v Speaker 1>I did, And this was a whole avenue that I

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<v Speaker 1>had not been down. I had no idea this was

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<v Speaker 1>a thing. So again, given that species of parrotfish are

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<v Speaker 1>found around the world, and that they can frequently be

0:12:44.080 --> 0:12:47.800
<v Speaker 1>found in shallow water, and that they have traditionally been

0:12:47.800 --> 0:12:51.920
<v Speaker 1>caught for culinary purposes for food, it should come as

0:12:52.000 --> 0:12:54.319
<v Speaker 1>no surprise that these fish were known to people so

0:12:54.440 --> 0:12:58.160
<v Speaker 1>the ancient world, you know, even in times when folks

0:12:59.080 --> 0:13:02.800
<v Speaker 1>didn't have axe to the underwater world in any way

0:13:02.840 --> 0:13:05.560
<v Speaker 1>comparable to what we have today, they still knew what

0:13:05.600 --> 0:13:09.280
<v Speaker 1>these fish were, and in some cases they had some

0:13:09.480 --> 0:13:13.440
<v Speaker 1>rather insightful ideas about what they were doing. In other cases,

0:13:13.800 --> 0:13:18.000
<v Speaker 1>there are some very long standing misconceptions about what parrotfish do.

0:13:18.840 --> 0:13:21.560
<v Speaker 1>So in this we're going to actually bring up the

0:13:21.600 --> 0:13:24.760
<v Speaker 1>work of our dear old friend Roman historian Plenty of

0:13:24.760 --> 0:13:28.960
<v Speaker 1>the Elder, who is one of several sources of antiquity

0:13:29.240 --> 0:13:31.559
<v Speaker 1>that discusses the parrotfish, you know, and of course there's

0:13:31.600 --> 0:13:34.800
<v Speaker 1>a lot of shared content and so forth going on.

0:13:35.760 --> 0:13:38.600
<v Speaker 1>The fish would have been known as the scars. This

0:13:38.679 --> 0:13:41.199
<v Speaker 1>is of course, now where we get the name of

0:13:41.280 --> 0:13:45.520
<v Speaker 1>the genus for parrotfish, and we might assume that in

0:13:45.559 --> 0:13:49.120
<v Speaker 1>particular we're dealing with discussions of the Mediterranean parrotfish, though

0:13:49.520 --> 0:13:51.240
<v Speaker 1>based on what I was reading. Also, you had like

0:13:51.600 --> 0:13:54.960
<v Speaker 1>the red sea parrotfish that was also known to various

0:13:55.000 --> 0:13:58.320
<v Speaker 1>cultures of antiquity. So Plenty of the Elder in the

0:13:58.400 --> 0:14:03.080
<v Speaker 1>Natural History seventy nine CE rites at the present day

0:14:03.200 --> 0:14:07.199
<v Speaker 1>the first place, and this is he's speaking from a

0:14:07.360 --> 0:14:10.800
<v Speaker 1>culinary perspective here. First place at the Roman table is

0:14:10.840 --> 0:14:14.280
<v Speaker 1>given to the scars, the only fish that is said

0:14:14.320 --> 0:14:17.040
<v Speaker 1>to ruminate and to feed on grass and not on

0:14:17.120 --> 0:14:21.200
<v Speaker 1>other fish. It is most commonly found in the Carpathian Sea,

0:14:21.640 --> 0:14:26.120
<v Speaker 1>and never of its own accord passes lectum a promontory

0:14:26.360 --> 0:14:30.400
<v Speaker 1>of trois now. Nineteenth century naturalist George Cuvier and his

0:14:30.480 --> 0:14:34.840
<v Speaker 1>annotations to Plenty points out again that the first place

0:14:34.880 --> 0:14:39.040
<v Speaker 1>here is in reference to the Roman dinner table, where

0:14:39.600 --> 0:14:43.600
<v Speaker 1>this fish was celebrated for several attributed characteristics that I'll

0:14:43.600 --> 0:14:46.920
<v Speaker 1>get to in a minute, and was also typically quote

0:14:47.080 --> 0:14:51.000
<v Speaker 1>salted with the intestines in it. M okay, and some

0:14:51.160 --> 0:14:55.160
<v Speaker 1>Roman authors actually absolutely insisted that you do not eat

0:14:55.200 --> 0:14:58.440
<v Speaker 1>this fish without the intestines included. It's just too delicious

0:14:58.480 --> 0:14:58.880
<v Speaker 1>this way.

0:14:59.360 --> 0:15:02.440
<v Speaker 3>Oh boy, So like, are you saying they would eat

0:15:02.480 --> 0:15:05.200
<v Speaker 3>the intestines directly or it's like you got to leave

0:15:05.240 --> 0:15:08.640
<v Speaker 3>the intestines in there to give them meat some flavor.

0:15:08.320 --> 0:15:10.840
<v Speaker 1>You've got to leave them in. Yeah, okay, And I

0:15:10.880 --> 0:15:14.800
<v Speaker 1>know they were often in many cultures salted and then traded,

0:15:14.920 --> 0:15:17.880
<v Speaker 1>So I'm offhand, I'm not entirely sure if this is

0:15:18.040 --> 0:15:22.040
<v Speaker 1>a definite case of we're talking about salted parrotfish with

0:15:22.120 --> 0:15:25.600
<v Speaker 1>the intestines still in, or some other form of preparing them.

0:15:25.640 --> 0:15:28.400
<v Speaker 1>But at any right, they really liked it. There are

0:15:28.440 --> 0:15:32.800
<v Speaker 1>also Roman references to eating parrotfish livers as a delicacy.

0:15:33.160 --> 0:15:37.040
<v Speaker 3>Mm so all the value here is just for their

0:15:37.080 --> 0:15:39.680
<v Speaker 3>flesh as food. This is a first place distinction that

0:15:39.680 --> 0:15:43.600
<v Speaker 3>would probably not be so flattering to the fish itself, right.

0:15:43.560 --> 0:15:46.720
<v Speaker 1>Right, And the Romans weren't alone in appreciating eating parrotfishes.

0:15:46.760 --> 0:15:49.720
<v Speaker 1>We'll get to some other far flowing examples. Plenty of

0:15:49.800 --> 0:15:54.120
<v Speaker 1>humans have eaten parrotfish and still eat parrotfish. The Greeks

0:15:54.160 --> 0:16:00.280
<v Speaker 1>love them. There's some I think twenty species of Mediterranean parrotfish. Again,

0:16:00.320 --> 0:16:04.640
<v Speaker 1>there's the red sea parrotfish, considered a delicacy in antiquity,

0:16:05.120 --> 0:16:08.880
<v Speaker 1>And in both of these cases, I believe they were

0:16:08.880 --> 0:16:11.760
<v Speaker 1>often dried and then widely traded. I've read that in fact,

0:16:11.800 --> 0:16:14.400
<v Speaker 1>they were easily dried. I'm not sure about the particulars

0:16:14.440 --> 0:16:19.520
<v Speaker 1>of that, but I'll take their word on it that, Okay,

0:16:19.520 --> 0:16:22.200
<v Speaker 1>this is a fish that is easier to dry and

0:16:22.280 --> 0:16:24.720
<v Speaker 1>prepare and then trade across distances. You don't have to

0:16:24.760 --> 0:16:30.320
<v Speaker 1>eat it fresh by the seaside. Anyway, it was celebrated

0:16:30.320 --> 0:16:32.600
<v Speaker 1>at the Roman table, not just because you ate it

0:16:32.640 --> 0:16:35.760
<v Speaker 1>salted and with the guts in it, but also for

0:16:36.000 --> 0:16:39.880
<v Speaker 1>several reasons, according to Cuvier, and I think a lot

0:16:39.960 --> 0:16:41.720
<v Speaker 1>of these seem to get down to the fact that

0:16:41.920 --> 0:16:45.440
<v Speaker 1>I'm assuming the Romans liked a great story at the table.

0:16:45.520 --> 0:16:48.240
<v Speaker 1>You know, it's not just about what the fish smells like,

0:16:48.280 --> 0:16:51.400
<v Speaker 1>taste like, looks like on the plate, but also what

0:16:51.480 --> 0:16:53.960
<v Speaker 1>is the story of it, what ideas are wrapped up

0:16:54.000 --> 0:16:57.240
<v Speaker 1>in this particular organism. So here that first of all,

0:16:57.360 --> 0:16:59.880
<v Speaker 1>it was thought to be the only ruminating fish.

0:17:00.560 --> 0:17:05.240
<v Speaker 3>So so wait, does that mean ruminating as in like

0:17:04.800 --> 0:17:07.600
<v Speaker 3>a like chewing the cud like a cow or a sheep.

0:17:07.960 --> 0:17:11.840
<v Speaker 1>Yes, though basically I think what this comes down. First

0:17:11.840 --> 0:17:14.679
<v Speaker 1>of all, they're not truly chewing the cut. They're not

0:17:14.840 --> 0:17:18.040
<v Speaker 1>truly ruminating, you know, they're not chewing something that has

0:17:18.080 --> 0:17:22.840
<v Speaker 1>previously been chewed and swallowed. They are grazing like a cow.

0:17:23.040 --> 0:17:25.880
<v Speaker 1>And I think it has to do with observations of

0:17:25.920 --> 0:17:29.400
<v Speaker 1>these animals grazing, and it's like, oh, look they're they're

0:17:29.480 --> 0:17:33.960
<v Speaker 1>like a cow. They're ruminating. But still the idea that

0:17:33.960 --> 0:17:37.040
<v Speaker 1>they're ruminating, the idea that they're chewing their cut continues

0:17:37.119 --> 0:17:40.560
<v Speaker 1>to be mentioned all through antiquity on all the way

0:17:40.640 --> 0:17:44.520
<v Speaker 1>up through like medieval besty areas those some voices such

0:17:44.520 --> 0:17:47.840
<v Speaker 1>as Saint Ambrose in the fourth century said that did

0:17:47.880 --> 0:17:50.720
<v Speaker 1>point out the chud the cud chewing thing is not accurate,

0:17:50.760 --> 0:17:53.760
<v Speaker 1>that's not what they're doing. So but but still a

0:17:53.800 --> 0:17:57.280
<v Speaker 1>lot of misinformation about these fish persisted for a very

0:17:57.280 --> 0:18:02.560
<v Speaker 1>long time now. As Aristotle also observed in History of Animals,

0:18:03.080 --> 0:18:07.360
<v Speaker 1>the parrett fish were thought to be vegetarians, and indeed,

0:18:07.400 --> 0:18:10.840
<v Speaker 1>I guess you could say they're essentially herbivores. Many sources

0:18:11.240 --> 0:18:14.119
<v Speaker 1>will classify them as such, but also note that they're

0:18:14.160 --> 0:18:18.119
<v Speaker 1>maybe more more correct to say that they're algavores. But

0:18:18.240 --> 0:18:21.720
<v Speaker 1>still ancient people observe that these fish are not eating

0:18:21.760 --> 0:18:23.440
<v Speaker 1>in the same way that other fish are.

0:18:23.840 --> 0:18:25.600
<v Speaker 3>Wow, this is something I feel like I should know.

0:18:25.640 --> 0:18:27.760
<v Speaker 3>The answer to, but I actually don't what is it called.

0:18:27.800 --> 0:18:32.560
<v Speaker 3>If you mostly eat you know, algae or plant things

0:18:32.560 --> 0:18:36.840
<v Speaker 3>that are like plants, plants, or types of bacteria microorganisms,

0:18:36.880 --> 0:18:40.840
<v Speaker 3>but sometimes you eat animals. But the animals are not

0:18:41.760 --> 0:18:45.160
<v Speaker 3>like you know, large moving animals, they're you know, basically

0:18:45.680 --> 0:18:47.920
<v Speaker 3>small invertebrate animals like corals.

0:18:48.200 --> 0:18:49.600
<v Speaker 1>Yeah, I guess you would be some sort of a

0:18:49.600 --> 0:18:53.960
<v Speaker 1>coral war or something to that effect, right, But on

0:18:54.000 --> 0:18:56.359
<v Speaker 1>a number of the different fish databases that I was

0:18:56.359 --> 0:19:00.840
<v Speaker 1>looking at, yeah, sometimes they'll say herbivore, sometimes they'll say herbivore, algivore,

0:19:00.880 --> 0:19:03.399
<v Speaker 1>and then sometimes there's kind of an omnivore note as well.

0:19:03.720 --> 0:19:06.120
<v Speaker 1>I guess there's always a margin of error, as we've

0:19:06.119 --> 0:19:09.359
<v Speaker 1>discussed here, like even things like a cow, which we

0:19:09.400 --> 0:19:12.399
<v Speaker 1>think of is kind of a pure herbivore. There are examples,

0:19:12.480 --> 0:19:14.880
<v Speaker 1>as we've discussed on the show in the past, where

0:19:14.920 --> 0:19:17.320
<v Speaker 1>they have been observed to if meat is available, they

0:19:17.400 --> 0:19:18.560
<v Speaker 1>might eat set meat.

0:19:18.800 --> 0:19:21.160
<v Speaker 3>But it is true that in the cases where parrotfish

0:19:21.280 --> 0:19:25.560
<v Speaker 3>are eating animals, they're not generally like chasing after other

0:19:25.680 --> 0:19:27.960
<v Speaker 3>fish and eating them or something. I don't know if

0:19:28.000 --> 0:19:30.720
<v Speaker 3>that might happen in some particular case but that's not

0:19:30.880 --> 0:19:34.840
<v Speaker 3>generally what parrotfish do. They're mostly going to be eating algae,

0:19:35.000 --> 0:19:39.600
<v Speaker 3>and then if they're eating animals, they're like marine invertebrate animals.

0:19:39.960 --> 0:19:42.800
<v Speaker 1>Yeah, so I mean we can, I think basically say

0:19:42.840 --> 0:19:48.159
<v Speaker 1>that ancient people were correct in this judgment. Now, and

0:19:48.200 --> 0:19:50.080
<v Speaker 1>I guess maybe it made the story at the dinner

0:19:50.119 --> 0:19:52.000
<v Speaker 1>table a little more interesting. They're like, this is the

0:19:52.040 --> 0:19:55.600
<v Speaker 1>cow of the sea, that sort of thing. Now, the

0:19:55.680 --> 0:19:59.320
<v Speaker 1>third attribute that Kuvia mentions is quote because it had

0:19:59.359 --> 0:20:02.760
<v Speaker 1>the faculty of producing a sound. Now, perhaps I'm not

0:20:03.000 --> 0:20:07.359
<v Speaker 1>completely understanding Cuvier's point here, but I guess this is

0:20:07.400 --> 0:20:11.200
<v Speaker 1>referring to that constant chewing sound, that constant grazing sound

0:20:11.240 --> 0:20:15.119
<v Speaker 1>that one hears if your head is below water with

0:20:15.320 --> 0:20:18.480
<v Speaker 1>the fish. And again, this is not something that I

0:20:18.480 --> 0:20:21.760
<v Speaker 1>would think actually impacts one's enjoyment of dinner. But again,

0:20:21.800 --> 0:20:23.040
<v Speaker 1>I guess they liked a good story.

0:20:23.600 --> 0:20:25.960
<v Speaker 3>You know, sometimes people they say they want their steak

0:20:26.040 --> 0:20:28.320
<v Speaker 3>rare by saying I want it still mooing. It's kind

0:20:28.400 --> 0:20:30.760
<v Speaker 3>a kind of a gruesome way to ask for it.

0:20:30.800 --> 0:20:32.679
<v Speaker 3>But people do say that. Can you say that, like,

0:20:32.840 --> 0:20:35.600
<v Speaker 3>I want my parrot fish steak rare? I want it

0:20:35.640 --> 0:20:37.160
<v Speaker 3>still scraping, I guess.

0:20:37.160 --> 0:20:41.280
<v Speaker 1>So the fourth attribute that he mentions is quote for

0:20:41.359 --> 0:20:44.879
<v Speaker 1>its salacious propensities numbers being taken by means of a

0:20:44.880 --> 0:20:48.280
<v Speaker 1>female attached to a string. This, I guess alluding to

0:20:48.320 --> 0:20:51.520
<v Speaker 1>a supposed method of catching them. And I suppose the

0:20:51.600 --> 0:20:54.719
<v Speaker 1>Romans just like Randy food, though I'm not sure it

0:20:54.760 --> 0:20:57.320
<v Speaker 1>was actually considered an afrodisiac because I didn't see it

0:20:57.400 --> 0:20:59.959
<v Speaker 1>listed in another source I was looking at that had

0:21:00.080 --> 0:21:02.680
<v Speaker 1>to do with various foods of the Romans did believe

0:21:02.680 --> 0:21:03.720
<v Speaker 1>were aphrodisiacs.

0:21:03.880 --> 0:21:04.760
<v Speaker 3>Uh huh okay.

0:21:05.320 --> 0:21:09.680
<v Speaker 1>And then fifthly for its quote remarkable sagacity and affording

0:21:09.680 --> 0:21:12.760
<v Speaker 1>assistance to another when taken in the net.

0:21:13.920 --> 0:21:15.320
<v Speaker 3>Huh, Now what would that mean?

0:21:15.800 --> 0:21:20.720
<v Speaker 1>So this is referring to something that is that that

0:21:20.800 --> 0:21:23.760
<v Speaker 1>pops up in various old sources as well, and again

0:21:24.840 --> 0:21:31.159
<v Speaker 1>continues to persist for centuries. May be particularly referring to

0:21:31.200 --> 0:21:35.600
<v Speaker 1>a passage in Ovid. Ovid has the following passage quote,

0:21:36.119 --> 0:21:39.520
<v Speaker 1>the scas is caught by a stratagem beneath the waves,

0:21:39.880 --> 0:21:43.840
<v Speaker 1>and it length dreads the bait. Fraught with treachery, it

0:21:43.960 --> 0:21:46.960
<v Speaker 1>dares not strike the osers. This refers to a reed

0:21:47.040 --> 0:21:50.800
<v Speaker 1>basket with an effort of its head, but turning away

0:21:50.880 --> 0:21:54.119
<v Speaker 1>as it loosens the twigs with frequent blows of its tail,

0:21:54.640 --> 0:21:58.120
<v Speaker 1>it makes its passage and escapes safely into the deep. Moreover,

0:21:58.440 --> 0:22:02.639
<v Speaker 1>if perchance any kind scarus swimming behind sees it struggling

0:22:03.040 --> 0:22:06.080
<v Speaker 1>with the osures, he takes hold of its tail in

0:22:06.160 --> 0:22:10.040
<v Speaker 1>his mouth and it is thus turned away, and so

0:22:10.359 --> 0:22:14.720
<v Speaker 1>it makes its escape. So, okay, they have this idea

0:22:14.920 --> 0:22:22.160
<v Speaker 1>that these fish, these parrotfish, are essentially I don't think

0:22:22.200 --> 0:22:24.520
<v Speaker 1>you social would be the term, but they are. They

0:22:24.560 --> 0:22:26.760
<v Speaker 1>help each other out. They're capable of some form of

0:22:26.800 --> 0:22:30.160
<v Speaker 1>altruism where if they see another one of their kinds

0:22:30.200 --> 0:22:34.440
<v Speaker 1>stuck in one of these wicker basket traps, they will

0:22:34.440 --> 0:22:35.560
<v Speaker 1>try and help them out.

0:22:36.200 --> 0:22:37.080
<v Speaker 3>Huh.

0:22:37.119 --> 0:22:40.320
<v Speaker 1>And so this idea ends up sticking around for against

0:22:40.320 --> 0:22:44.520
<v Speaker 1>centuries and centuries. The idea that the scais or parrotfish

0:22:44.600 --> 0:22:46.800
<v Speaker 1>is not only a cud chewing herbivore of the sea,

0:22:46.920 --> 0:22:50.560
<v Speaker 1>but also a friendly fish that looks out for it's fellows.

0:22:50.520 --> 0:22:53.600
<v Speaker 3>Well, that's fascinating, But I wonder what would this belief

0:22:53.640 --> 0:22:57.280
<v Speaker 3>about their like friendly behavior be based on. So the

0:22:57.320 --> 0:22:59.920
<v Speaker 3>idea is they help each other avoid traps, or say

0:23:00.119 --> 0:23:02.879
<v Speaker 3>each other from traps. Is there any modern research on this?

0:23:03.320 --> 0:23:05.439
<v Speaker 1>So the main source I found on this, and this

0:23:05.480 --> 0:23:07.960
<v Speaker 1>is where I got turned onto the idea, it was

0:23:08.000 --> 0:23:12.600
<v Speaker 1>the blog of Fishtories. It's like histories and fish combined.

0:23:12.640 --> 0:23:14.800
<v Speaker 1>That's f I S H T O r I E

0:23:14.920 --> 0:23:19.359
<v Speaker 1>S dot net. It is a blog maintained by Sophia Hendricks,

0:23:19.680 --> 0:23:24.000
<v Speaker 1>an information scientist and historian of science. She discusses this

0:23:24.040 --> 0:23:27.800
<v Speaker 1>whole weird scenario with imagery of the parrotfish, because indeed

0:23:27.800 --> 0:23:31.680
<v Speaker 1>there's there's there's imagery associated. I included this illustration here

0:23:31.760 --> 0:23:34.840
<v Speaker 1>for you here Joe from a munch latter later source.

0:23:36.480 --> 0:23:40.640
<v Speaker 1>But but she does point out that based on what

0:23:40.680 --> 0:23:43.840
<v Speaker 1>we can tell, the fish are actually anything but friendly

0:23:43.880 --> 0:23:47.959
<v Speaker 1>to each other in these scenarios. Wicker baskets like this

0:23:48.160 --> 0:23:50.439
<v Speaker 1>are still used in some places to catch fish, she

0:23:50.480 --> 0:23:53.400
<v Speaker 1>points out. But she writes that the parrotfish have actually

0:23:53.440 --> 0:23:57.160
<v Speaker 1>been observed too violently attacked their fellow parrotfish that become

0:23:57.240 --> 0:24:02.760
<v Speaker 1>caught in the reeds of the fishing basket. So I

0:24:02.800 --> 0:24:07.120
<v Speaker 1>don't know that there's really much evidence to back this up.

0:24:08.200 --> 0:24:10.520
<v Speaker 1>I also get to an example here in a bit

0:24:10.600 --> 0:24:17.640
<v Speaker 1>involving traditional Hawaiian techniques for catching parrotfish that also uses

0:24:17.680 --> 0:24:20.879
<v Speaker 1>the basket, like the idea of being essentially that the

0:24:20.880 --> 0:24:25.400
<v Speaker 1>parrotfish are roaming around the corals feeding and they kind

0:24:25.400 --> 0:24:27.960
<v Speaker 1>of have these paths that they follow. They also tend

0:24:28.320 --> 0:24:30.760
<v Speaker 1>to sort of group together, and you may have what

0:24:30.840 --> 0:24:33.280
<v Speaker 1>seems to be a leader of the pack. And if

0:24:33.320 --> 0:24:35.280
<v Speaker 1>you set up these baskets at the right time, you

0:24:35.320 --> 0:24:37.399
<v Speaker 1>can catch them, and you can end up catching a

0:24:37.400 --> 0:24:41.119
<v Speaker 1>bunch of them even and you can then release the

0:24:41.119 --> 0:24:43.159
<v Speaker 1>ones you don't want, make use of the ones you

0:24:43.240 --> 0:24:47.440
<v Speaker 1>want to harvest. So I don't know. On one level,

0:24:47.440 --> 0:24:50.159
<v Speaker 1>it seems like, OK, you're ending up with an artificial

0:24:50.440 --> 0:24:54.960
<v Speaker 1>environment scenario here, where you're dealing essentially with captive fish

0:24:55.200 --> 0:24:58.200
<v Speaker 1>doing things in a captive environment and a high stakes

0:24:58.240 --> 0:25:01.600
<v Speaker 1>environment for them that they might not do otherwise, and

0:25:01.800 --> 0:25:04.840
<v Speaker 1>that may mean attacking each other that I guess could

0:25:04.840 --> 0:25:09.000
<v Speaker 1>also mean some sort of observational behavior, especially without the

0:25:09.040 --> 0:25:12.280
<v Speaker 1>aid of any kind of like snorkeling mask and so forth,

0:25:12.520 --> 0:25:15.560
<v Speaker 1>it might look like one's helping the others out. I'm

0:25:15.560 --> 0:25:19.280
<v Speaker 1>not sure, but still the idea becomes entrenched and the

0:25:19.359 --> 0:25:23.240
<v Speaker 1>image of the parrotfish helping each other escape from fishing

0:25:23.280 --> 0:25:27.960
<v Speaker 1>baskets ends up becoming a symbol of friendship. Oh yeah,

0:25:28.040 --> 0:25:30.879
<v Speaker 1>so this is something that she discusses at length in

0:25:31.359 --> 0:25:35.040
<v Speaker 1>another paper. This is something that published in Emblems of

0:25:35.080 --> 0:25:40.600
<v Speaker 1>the Natural World from twenty fifteen Ichthyology and Emblematics in

0:25:40.960 --> 0:25:48.200
<v Speaker 1>Conrad Gesner's Historia Piscium and Joham Kamarius's Kamarus the Youngers

0:25:48.520 --> 0:25:53.560
<v Speaker 1>Simbola at Emblemata. She points out that Plenty was one

0:25:53.600 --> 0:25:56.639
<v Speaker 1>of the key sources for this misconception, but plenty of

0:25:56.640 --> 0:26:00.840
<v Speaker 1>others sources in the ancient world echoed at Plutarch chimes

0:26:00.880 --> 0:26:03.600
<v Speaker 1>in on it, and so some sources identified this as

0:26:03.640 --> 0:26:07.440
<v Speaker 1>a sign of intelligence in the parrotfish, while other fishes

0:26:07.480 --> 0:26:10.080
<v Speaker 1>were often held up as examples of a lack of intelligence,

0:26:10.080 --> 0:26:13.640
<v Speaker 1>and fish, such as then Conrad Gessner's sixteenth century work

0:26:13.680 --> 0:26:18.160
<v Speaker 1>Historian Animalium, the mackerel was held up as a stupid fish.

0:26:18.240 --> 0:26:22.440
<v Speaker 3>For example, how do you get that distinction as a fish?

0:26:22.680 --> 0:26:25.040
<v Speaker 1>I don't know, I mean, maybe they just it's probably

0:26:25.119 --> 0:26:28.160
<v Speaker 1>a little bit unfair, right in some cases the macvil

0:26:28.160 --> 0:26:30.440
<v Speaker 1>looks to and you're basing everything on the human perspective

0:26:30.520 --> 0:26:34.239
<v Speaker 1>and human expectations of what an animal's intelligence is, you know,

0:26:34.280 --> 0:26:36.600
<v Speaker 1>whereas ultimately you can I think you can approach these

0:26:36.600 --> 0:26:39.280
<v Speaker 1>scenarios by saying, well, yeah, the parrotfish is in a

0:26:39.320 --> 0:26:41.720
<v Speaker 1>way a genius. It's as smart as it needs to

0:26:41.760 --> 0:26:43.080
<v Speaker 1>be to do the things that it does.

0:26:43.760 --> 0:26:46.879
<v Speaker 3>Well. Actually, you know what, I wonder if some of

0:26:46.920 --> 0:26:49.119
<v Speaker 3>this I have no idea if it applies in this case,

0:26:49.160 --> 0:26:53.439
<v Speaker 3>but I wonder if some general ideas about smartfish versus

0:26:53.520 --> 0:26:57.800
<v Speaker 3>dumbfish come just from the experience of fishing for different

0:26:57.800 --> 0:27:02.320
<v Speaker 3>types of fish, because I know, you know, and people

0:27:02.320 --> 0:27:04.840
<v Speaker 3>who are into fishing right in and let us know

0:27:04.840 --> 0:27:08.640
<v Speaker 3>if this matches your experience. In my experience, people who

0:27:08.760 --> 0:27:11.119
<v Speaker 3>like to fish will like say that a fish that

0:27:11.240 --> 0:27:14.720
<v Speaker 3>is harder to catch is a smart fish, and one

0:27:14.720 --> 0:27:18.240
<v Speaker 3>that's easier to catches like a dumb fish. And I

0:27:18.240 --> 0:27:20.720
<v Speaker 3>don't know if intelligence actually has anything to do with

0:27:20.920 --> 0:27:23.280
<v Speaker 3>how easy they are to catch or not. You know,

0:27:23.400 --> 0:27:26.720
<v Speaker 3>might just have to do with like ingrained behavioral patterns,

0:27:26.720 --> 0:27:28.480
<v Speaker 3>someone responding distress or something.

0:27:29.000 --> 0:27:32.240
<v Speaker 1>Yeah. Yeah, And it's kind of curious because it sounds

0:27:32.400 --> 0:27:36.000
<v Speaker 1>like if you have the right traps for it, catching

0:27:36.000 --> 0:27:41.080
<v Speaker 1>parrotfish is generally not considered super challenging. So but you know,

0:27:41.119 --> 0:27:44.080
<v Speaker 1>we have this other narrative that emerges again that they're

0:27:44.119 --> 0:27:46.360
<v Speaker 1>helping each other and that they can sort of help

0:27:46.359 --> 0:27:59.760
<v Speaker 1>each other escape from these traps and so forth. Now

0:28:00.200 --> 0:28:03.119
<v Speaker 1>I mentioned Hawaiian traditions because again, you know, you have

0:28:03.200 --> 0:28:04.760
<v Speaker 1>parrotfish all over and you do have them in the

0:28:04.760 --> 0:28:10.960
<v Speaker 1>Hawaiian Islands and in Hawaii. The parrotfish was historically known

0:28:10.960 --> 0:28:15.320
<v Speaker 1>in the Hawaiian language as uhu. The fish are prominent

0:28:15.359 --> 0:28:20.000
<v Speaker 1>there and they were eaten by Hawaiians. Traditionally. There's a

0:28:20.080 --> 0:28:24.680
<v Speaker 1>saying in Hawaiian, according to the online Hawaiian dictionary Ulucal,

0:28:25.119 --> 0:28:28.199
<v Speaker 1>that translates to my craving makes my mouth water for

0:28:28.240 --> 0:28:32.520
<v Speaker 1>the parrotfish passing before my eyes. The Hawaii Coral Reef

0:28:32.560 --> 0:28:35.000
<v Speaker 1>Network points out that not only were they a delicacy,

0:28:35.240 --> 0:28:39.000
<v Speaker 1>but their liver was especially favored. So again, you know,

0:28:39.600 --> 0:28:41.320
<v Speaker 1>you know, other side of the world, you still have

0:28:41.360 --> 0:28:44.440
<v Speaker 1>people eating parrotfish and also realizing that the liver is

0:28:44.480 --> 0:28:45.400
<v Speaker 1>apparently really good.

0:28:45.760 --> 0:28:46.320
<v Speaker 3>Interesting.

0:28:46.920 --> 0:28:49.200
<v Speaker 1>Now, the fish itself, to the Hawaiians, had connotations of

0:28:49.200 --> 0:28:52.520
<v Speaker 1>physical beauty, as in one's love interest, but also in

0:28:52.600 --> 0:28:56.080
<v Speaker 1>terms of a desirable bachelor. There was also apparently a

0:28:56.080 --> 0:28:59.440
<v Speaker 1>tradition that held that a fisherman could observe the behavior

0:28:59.560 --> 0:29:01.800
<v Speaker 1>of a pair of fish and it would serve as

0:29:01.800 --> 0:29:04.320
<v Speaker 1>a kind of portent as to what was going on

0:29:04.440 --> 0:29:06.960
<v Speaker 1>back home. So like, you know, certain things the parrotfish

0:29:07.040 --> 0:29:09.080
<v Speaker 1>was doing. It's like, okay, everything's cool back of the house.

0:29:10.080 --> 0:29:12.040
<v Speaker 1>Other things the parrotfish might be doing. It's like you

0:29:12.080 --> 0:29:13.640
<v Speaker 1>need to go back and check on your wife, that

0:29:13.720 --> 0:29:18.440
<v Speaker 1>sort of thing. Now, the parrotfish who also factors into

0:29:18.800 --> 0:29:23.000
<v Speaker 1>one of the stories of a legendary figure in Hawaiian mythology.

0:29:23.360 --> 0:29:27.360
<v Speaker 1>And I could not find a like a solid pronunciation

0:29:27.480 --> 0:29:30.080
<v Speaker 1>guide for this name, so I hope I'm saying it

0:29:30.440 --> 0:29:32.720
<v Speaker 1>somewhere close to correctly, and my apologies if I'm not

0:29:33.880 --> 0:29:38.880
<v Speaker 1>punia Kaya. This is in these stories. He's a dashing

0:29:38.920 --> 0:29:42.560
<v Speaker 1>young man who one day leaves his parents' house because

0:29:42.560 --> 0:29:44.480
<v Speaker 1>he feels this call of the ocean. He wants to

0:29:44.520 --> 0:29:48.560
<v Speaker 1>go fishing, and so he catches this young, supernatural fish

0:29:48.720 --> 0:29:52.800
<v Speaker 1>the first Ooh, and it makes it his pet, and

0:29:52.800 --> 0:29:55.520
<v Speaker 1>then he releases it where it becomes the parent of

0:29:55.560 --> 0:29:58.920
<v Speaker 1>all fish, and so afterwards he's able to go call

0:29:59.000 --> 0:30:03.600
<v Speaker 1>upon the fish to the or fellow fish to the fishermen. Yeah.

0:30:03.680 --> 0:30:06.280
<v Speaker 1>I was reading more about this in Native Use of

0:30:06.280 --> 0:30:09.640
<v Speaker 1>Fish in Hawaii by Margaret Titcomb, and the author makes

0:30:09.800 --> 0:30:13.160
<v Speaker 1>a connection to the manner in which parrotfish move along

0:30:13.280 --> 0:30:17.560
<v Speaker 1>in a school, often single file, seemingly led by a leader.

0:30:18.280 --> 0:30:20.480
<v Speaker 1>So that, yeah, this special trap was devised by the

0:30:20.480 --> 0:30:23.920
<v Speaker 1>early Hawaiians for use during a particular season. The trap

0:30:23.960 --> 0:30:26.760
<v Speaker 1>allowed them to allow the fish to file into the

0:30:26.760 --> 0:30:29.480
<v Speaker 1>trap led by the leader, but then they're unable to escape,

0:30:29.760 --> 0:30:32.480
<v Speaker 1>and they keep the trap in use during the May

0:30:32.800 --> 0:30:36.240
<v Speaker 1>June July season, collect enough fish for personal use, and

0:30:36.280 --> 0:30:39.360
<v Speaker 1>then release the rest, though another source I've looked at

0:30:39.480 --> 0:30:42.360
<v Speaker 1>seems to indicate that excess fish might have been harvested

0:30:42.400 --> 0:30:44.360
<v Speaker 1>to feed pigs and dogs, So I don't know. There

0:30:44.360 --> 0:30:48.320
<v Speaker 1>may be some variety in the practice, or there might

0:30:48.320 --> 0:30:50.280
<v Speaker 1>be a misconception on one side or the other, but

0:30:50.280 --> 0:30:53.920
<v Speaker 1>at any rate, this is how they caught them, and

0:30:54.000 --> 0:30:57.200
<v Speaker 1>I guess by virtue of that leader fish leads into

0:30:57.240 --> 0:31:00.280
<v Speaker 1>this idea that there's kind of like a fish that

0:31:00.400 --> 0:31:03.239
<v Speaker 1>is a friend of the people that will help you

0:31:03.320 --> 0:31:04.760
<v Speaker 1>catch more fish.

0:31:04.960 --> 0:31:07.960
<v Speaker 3>Like it's the leader of the school is deliberately leading

0:31:08.000 --> 0:31:09.200
<v Speaker 3>them into the trap for you.

0:31:09.600 --> 0:31:12.000
<v Speaker 1>Yeah, though not so much that it's like a trader fish,

0:31:12.040 --> 0:31:15.440
<v Speaker 1>but more than like it is this fish that a

0:31:16.400 --> 0:31:19.200
<v Speaker 1>like a legendary figure made a deal with that's sort

0:31:19.200 --> 0:31:21.360
<v Speaker 1>of thing. So yeah, this was a new one to

0:31:21.400 --> 0:31:23.920
<v Speaker 1>me as well. I don't think i'd heard this in

0:31:23.960 --> 0:31:27.600
<v Speaker 1>my previous trips to Hawaii. So and there may be

0:31:27.680 --> 0:31:30.800
<v Speaker 1>some more interesting partfish mythologies out there that I'll have

0:31:30.840 --> 0:31:33.200
<v Speaker 1>to turn up for the next episode.

0:31:33.720 --> 0:31:37.360
<v Speaker 3>That's really interesting. I like it. As I promised earlier,

0:31:37.440 --> 0:31:39.840
<v Speaker 3>I wanted to come back and talk a bit more

0:31:40.200 --> 0:31:44.680
<v Speaker 3>about how parrotfish eat and a little bit about the

0:31:44.720 --> 0:31:47.000
<v Speaker 3>equipment they used to do it and what happens after

0:31:47.120 --> 0:31:50.040
<v Speaker 3>they do it after they eat. So one source I

0:31:50.080 --> 0:31:54.720
<v Speaker 3>was looking at here is a chapter in the Biology

0:31:54.760 --> 0:31:59.680
<v Speaker 3>of Parrotfishes by CRC Press twenty eighteen. And this chapter

0:31:59.760 --> 0:32:02.400
<v Speaker 3>was by Peter S. Wainwright and Samantha A. Price. It's

0:32:02.400 --> 0:32:06.320
<v Speaker 3>called Innovation and Diversity of the Feeding Mechanism in Parrotfishes.

0:32:06.600 --> 0:32:09.040
<v Speaker 3>And I'll probably come back to this in subsequent episodes

0:32:09.080 --> 0:32:12.200
<v Speaker 3>as well. But about the authors, Peter C. Wainwright is

0:32:12.200 --> 0:32:15.040
<v Speaker 3>a biologist at UC Davis and Samantha A. Price is

0:32:15.040 --> 0:32:19.960
<v Speaker 3>a biologist at Clemson, and so the authors here say

0:32:20.120 --> 0:32:24.320
<v Speaker 3>that how parrotfishes eat to the various species of parrotfish,

0:32:24.400 --> 0:32:28.240
<v Speaker 3>how they eat is quote one of the fundamental ecological

0:32:28.320 --> 0:32:34.200
<v Speaker 3>processes in coral reef ecosystems. So when you think about parrotfish,

0:32:34.200 --> 0:32:36.960
<v Speaker 3>you shouldn't just think of them as something you occasionally

0:32:37.040 --> 0:32:40.240
<v Speaker 3>see in a coral reef, but rather they are an

0:32:40.320 --> 0:32:44.440
<v Speaker 3>integral part of how coral reef ecosystems work, and kind

0:32:44.480 --> 0:32:48.280
<v Speaker 3>of the whole ecosystem doesn't really work without them. Now,

0:32:48.280 --> 0:32:53.360
<v Speaker 3>as we mentioned earlier, the feeding process of parrotfish involves

0:32:53.400 --> 0:32:58.320
<v Speaker 3>a lot of scraping and biting into hard stony materials.

0:32:58.760 --> 0:33:02.520
<v Speaker 3>Parrotfishes swim around coral reefs using their teeth to scrape

0:33:02.720 --> 0:33:06.880
<v Speaker 3>edible stuff off the outside of coral, and they break

0:33:06.920 --> 0:33:09.560
<v Speaker 3>off some coral and bring it along with them in

0:33:09.600 --> 0:33:12.800
<v Speaker 3>the process. Now, what is that edible stuff on the

0:33:12.840 --> 0:33:16.000
<v Speaker 3>outside of the coral. The authors say that it includes

0:33:16.320 --> 0:33:20.560
<v Speaker 3>primarily algae. Algae is a big part, but also detritis,

0:33:20.600 --> 0:33:24.920
<v Speaker 3>and in a marine context this usually means dead organic material,

0:33:25.080 --> 0:33:29.120
<v Speaker 3>so parts of dead organisms, fecal matter, all that yummy stuff.

0:33:30.000 --> 0:33:34.440
<v Speaker 3>Sometimes it will include bacteria, little colonies of bacteria, and

0:33:34.520 --> 0:33:39.160
<v Speaker 3>then they just say, quote a wide range of encrusting invertebrates,

0:33:39.240 --> 0:33:42.080
<v Speaker 3>so all kinds of little invertebrate animals that could be

0:33:42.200 --> 0:33:46.800
<v Speaker 3>found on a coral reef. This might include coral polyps themselves,

0:33:47.240 --> 0:33:50.720
<v Speaker 3>and it might also include things like sponges. Now, a

0:33:50.760 --> 0:33:53.960
<v Speaker 3>couple of sources I was looking at sort of classified

0:33:53.960 --> 0:33:57.840
<v Speaker 3>several different types of parrotfish feeding strategies, and the main

0:33:57.920 --> 0:34:01.480
<v Speaker 3>variation here seemed to be how how deep the parrotfish

0:34:01.520 --> 0:34:05.200
<v Speaker 3>would cut into the stony parts of the coral. So

0:34:05.240 --> 0:34:07.440
<v Speaker 3>you might have some that are referred to more as

0:34:07.560 --> 0:34:11.480
<v Speaker 3>browsers or grazers, that tend to typically just take the

0:34:11.480 --> 0:34:14.560
<v Speaker 3>soft parts off the surface of the coral. You've got

0:34:14.640 --> 0:34:17.839
<v Speaker 3>scrapers which scrape the coral a little harder and get

0:34:17.960 --> 0:34:20.560
<v Speaker 3>some of what's underneath. And then you've got what are

0:34:20.560 --> 0:34:23.960
<v Speaker 3>called excavators, which are really just taking chunks out of

0:34:23.960 --> 0:34:27.680
<v Speaker 3>the hard stuff. So the parrotfishes swim along on the reef,

0:34:27.760 --> 0:34:30.879
<v Speaker 3>scraping the stuff off with their outer teeth or excavating

0:34:30.920 --> 0:34:34.719
<v Speaker 3>bits of it and inevitably leaving scars on the rock

0:34:34.800 --> 0:34:37.560
<v Speaker 3>or the coral skeletons as they go. And then all

0:34:37.600 --> 0:34:41.600
<v Speaker 3>of this mixture of both hard and soft parts goes

0:34:41.640 --> 0:34:45.279
<v Speaker 3>into the mouth, where it is subjected to a second obstacle,

0:34:45.480 --> 0:34:50.040
<v Speaker 3>which is the trial of the inner jaws. Because parrotfishes

0:34:50.520 --> 0:34:54.359
<v Speaker 3>don't only have these fascinating outer teeth, they have a

0:34:54.520 --> 0:34:57.560
<v Speaker 3>second set of teeth at the back of their mouth,

0:34:58.040 --> 0:35:01.520
<v Speaker 3>known as the fyringeal jaw. Now you might have read

0:35:01.520 --> 0:35:06.040
<v Speaker 3>about pharyngeal jaws with respect to other animals that have them.

0:35:06.320 --> 0:35:08.320
<v Speaker 3>A number of fish and creatures that live in the

0:35:08.360 --> 0:35:11.520
<v Speaker 3>sea have them, and a well known example is the

0:35:11.640 --> 0:35:12.440
<v Speaker 3>more eel.

0:35:12.840 --> 0:35:16.040
<v Speaker 1>That's right, Yeah, And of course, you know, those of

0:35:16.040 --> 0:35:18.520
<v Speaker 1>you who've watched any amount of science fiction, you might

0:35:18.560 --> 0:35:22.800
<v Speaker 1>also note that very angel jaws from in the world

0:35:22.800 --> 0:35:28.240
<v Speaker 1>of fictional monsters, we do have, of course, the alien xenomorph,

0:35:28.280 --> 0:35:30.200
<v Speaker 1>at least the main morph of the creature that we

0:35:30.239 --> 0:35:32.879
<v Speaker 1>see in those films, where we see this inner jaw

0:35:33.160 --> 0:35:36.160
<v Speaker 1>that functions as both a feeding mechanism and a puncturing weapon,

0:35:36.840 --> 0:35:39.480
<v Speaker 1>while elsewhere in the alien universe we see other morphs,

0:35:39.520 --> 0:35:42.360
<v Speaker 1>such as the deacon and the neo morph, that boast

0:35:42.800 --> 0:35:46.640
<v Speaker 1>extendable inner jaws rather than a secondary set of jaws.

0:35:47.680 --> 0:35:52.280
<v Speaker 1>But yeah, generally you often see some like comparative biology

0:35:52.280 --> 0:35:54.279
<v Speaker 1>write ups, and I think I've done right up to

0:35:54.320 --> 0:35:56.520
<v Speaker 1>this and this nature in the past, where when you're

0:35:56.560 --> 0:36:01.560
<v Speaker 1>comparing xenomorph physiology to the now world, the more a

0:36:01.600 --> 0:36:04.960
<v Speaker 1>eel is like a prime stopping point of comparison.

0:36:05.600 --> 0:36:08.400
<v Speaker 3>Now, the exact design of the fyrngeal jaw in the

0:36:08.480 --> 0:36:12.200
<v Speaker 3>xenomorphos a little bit extra like. I'm not aware of

0:36:12.239 --> 0:36:15.040
<v Speaker 3>any examples in the in the natural world where like

0:36:15.160 --> 0:36:18.200
<v Speaker 3>the inner jaw comes out of the mouth and stabs

0:36:18.320 --> 0:36:21.120
<v Speaker 3>like a spear, like bites through the torso of a

0:36:21.480 --> 0:36:25.319
<v Speaker 3>prey animal. The inner jaws in the cases I'm aware of,

0:36:25.320 --> 0:36:28.359
<v Speaker 3>tend to stay mostly within the outer jaws, but they

0:36:28.400 --> 0:36:33.520
<v Speaker 3>do do something fascinating and perhaps to some horrifying. So

0:36:33.719 --> 0:36:35.680
<v Speaker 3>in the case of the more a eel, which is

0:36:35.719 --> 0:36:39.840
<v Speaker 3>a predator, the fyryngial jaw helps the eel capture and

0:36:39.920 --> 0:36:44.160
<v Speaker 3>swallow large live prey animals without allowing them to escape.

0:36:44.600 --> 0:36:47.520
<v Speaker 3>So the eel first bites the prey with its regular

0:36:47.600 --> 0:36:49.680
<v Speaker 3>outer jaws. These are the jaws you'd see, you know,

0:36:49.719 --> 0:36:52.640
<v Speaker 3>with the teeth. They have backward curving teeth, and those

0:36:53.480 --> 0:36:56.239
<v Speaker 3>the orientation of the teeth, the backward curving nature of

0:36:56.280 --> 0:36:59.399
<v Speaker 3>them helps them keep the keep the prey in place

0:36:59.440 --> 0:37:02.480
<v Speaker 3>without allowing it to back out and escape. And then

0:37:02.600 --> 0:37:05.400
<v Speaker 3>while the eel is holding the prey in place with

0:37:05.440 --> 0:37:10.000
<v Speaker 3>these outer jaws, the inner jaws reach up from out

0:37:10.080 --> 0:37:13.280
<v Speaker 3>of the eel's throat to bite the animal and pull

0:37:13.320 --> 0:37:17.200
<v Speaker 3>it further inside the mouth and down into the esophagus.

0:37:17.320 --> 0:37:22.800
<v Speaker 3>So it's a two step capture and conveyance mechanism. Now

0:37:22.880 --> 0:37:25.160
<v Speaker 3>just to stick with the more eel in a sidebar

0:37:25.200 --> 0:37:27.880
<v Speaker 3>for a second, I got interested in this. The evolutionary

0:37:27.960 --> 0:37:33.000
<v Speaker 3>reasoning for this is an interesting question. Apparently, most predatory

0:37:33.080 --> 0:37:37.160
<v Speaker 3>fish rely in large part on suction to capture and

0:37:37.239 --> 0:37:41.680
<v Speaker 3>swallow their prey. So these other fish use their muscles

0:37:41.719 --> 0:37:46.000
<v Speaker 3>to rapidly expand the mouth through the throat cavity, and

0:37:46.120 --> 0:37:48.880
<v Speaker 3>so when it expands like this, it creates a negative

0:37:48.880 --> 0:37:52.000
<v Speaker 3>pressure and it sucks in water from outside the mouth,

0:37:52.120 --> 0:37:56.120
<v Speaker 3>including the prey in that water. And this suction mechanism

0:37:56.520 --> 0:37:59.239
<v Speaker 3>can either be the action that pulls the prey into

0:37:59.239 --> 0:38:01.080
<v Speaker 3>the mouth in the first place, or it can also

0:38:01.160 --> 0:38:04.880
<v Speaker 3>be that after a predatory fish bites the prey with

0:38:04.920 --> 0:38:08.880
<v Speaker 3>its jaws, the suction mechanism then pulls the prey farther

0:38:09.040 --> 0:38:11.640
<v Speaker 3>into the mouth and down into the esophagus.

0:38:12.000 --> 0:38:14.400
<v Speaker 1>Yeah, the scorpion fish is a great example of this,

0:38:14.440 --> 0:38:16.640
<v Speaker 1>and you can find some great video footage of this

0:38:16.760 --> 0:38:20.560
<v Speaker 1>where it's an ambush predator down there, hidden on the

0:38:21.080 --> 0:38:24.480
<v Speaker 1>floor of the sea, and then as its prey comes by,

0:38:24.560 --> 0:38:27.240
<v Speaker 1>it just kind of goes woomf and just rapidly sucks

0:38:27.239 --> 0:38:29.080
<v Speaker 1>it into its mouth and it's just gone like that.

0:38:30.120 --> 0:38:32.680
<v Speaker 1>And the scorpion fish is of course you'll note get

0:38:32.800 --> 0:38:37.120
<v Speaker 1>very robust looking, kind of frog ish looking, and that

0:38:37.400 --> 0:38:39.040
<v Speaker 1>is key here too, Right.

0:38:39.160 --> 0:38:41.720
<v Speaker 3>So I was reading a two thousand and seven National

0:38:41.800 --> 0:38:46.000
<v Speaker 3>Science Foundation press release about research on moray eels published

0:38:46.000 --> 0:38:48.520
<v Speaker 3>in Nature that year, and the studies lead author, a

0:38:48.600 --> 0:38:53.040
<v Speaker 3>UC Davis scientist named Rita Meta, says that her study

0:38:53.239 --> 0:38:57.360
<v Speaker 3>found because of the way more eel bodies are shaped,

0:38:57.800 --> 0:39:01.960
<v Speaker 3>they're not able to generate much suction in the mouth cavity,

0:39:02.560 --> 0:39:05.880
<v Speaker 3>so instead they have this secondary set of jaws in

0:39:06.000 --> 0:39:09.480
<v Speaker 3>the throat. More eels are predators that often live in

0:39:09.520 --> 0:39:13.040
<v Speaker 3>coral reefs and they hide in little holes, gaps and

0:39:13.160 --> 0:39:16.840
<v Speaker 3>niches in the reef, and so a possible reason given

0:39:17.040 --> 0:39:20.960
<v Speaker 3>for this evolutionary difference why they have the feryngial jaws

0:39:21.000 --> 0:39:25.360
<v Speaker 3>instead of the suction mechanism is that by having pharyngeal jaws,

0:39:25.680 --> 0:39:29.640
<v Speaker 3>they can attack and swallow relatively large prey in tight,

0:39:29.800 --> 0:39:33.160
<v Speaker 3>confined little spaces where there would not be enough room

0:39:33.360 --> 0:39:36.480
<v Speaker 3>for them to expand the mouth or throat cavity to

0:39:36.520 --> 0:39:37.280
<v Speaker 3>create suction.

0:39:38.120 --> 0:39:40.520
<v Speaker 1>Fascinating, it makes perfect sense.

0:39:41.200 --> 0:39:44.080
<v Speaker 3>So that's an interesting idea, But I also think it's

0:39:44.120 --> 0:39:47.879
<v Speaker 3>an interesting parallel. You've got more eels and parrotfishes, which

0:39:47.880 --> 0:39:52.240
<v Speaker 3>are both coral reef dwellers and both have forryngial jaws,

0:39:52.280 --> 0:39:55.760
<v Speaker 3>but they use these inner jaws for totally different purposes. Again,

0:39:55.760 --> 0:39:58.319
<v Speaker 3>in the eel, it's to pull the prey down the

0:39:58.440 --> 0:40:02.120
<v Speaker 3>throat once it's in the mouth. Parrotfishes are again not

0:40:02.320 --> 0:40:05.919
<v Speaker 3>generally going to be chasing large live prey. They're mostly herbivores,

0:40:05.920 --> 0:40:08.759
<v Speaker 3>and they eat by scraping or gouging the coral and

0:40:08.840 --> 0:40:12.400
<v Speaker 3>getting stuff off the outside or in the layers underneath

0:40:12.520 --> 0:40:16.640
<v Speaker 3>the surface. This material that they scrape off of rocks

0:40:16.640 --> 0:40:20.640
<v Speaker 3>and coral, which mostly includes algae and other microbial organisms,

0:40:20.719 --> 0:40:25.080
<v Speaker 3>but also dead organic matter and coral skeleton bits, is

0:40:25.200 --> 0:40:29.920
<v Speaker 3>pulled down into the pharyngeal teeth where to quote Wainwright

0:40:30.000 --> 0:40:33.280
<v Speaker 3>and Price, it is quote mixed with mucus and ground

0:40:33.280 --> 0:40:37.200
<v Speaker 3>to a fine slurry before being passed to the intestines.

0:40:37.760 --> 0:40:40.279
<v Speaker 3>And Rob I was just looking up some photos of

0:40:40.320 --> 0:40:45.560
<v Speaker 3>parrotfish phyngeal teeth, and oh boy, what what are we

0:40:45.600 --> 0:40:48.760
<v Speaker 3>looking at here? These are some organs like they're clearly

0:40:48.800 --> 0:40:53.000
<v Speaker 3>specialized for grinding down this mixture of hard and soft

0:40:53.040 --> 0:40:57.520
<v Speaker 3>substances into a mucous, lubricated slurry. But some of these

0:40:57.880 --> 0:41:02.480
<v Speaker 3>pieces of parrotfish anatomy look like a car transmission gear

0:41:02.560 --> 0:41:06.160
<v Speaker 3>made out of bone. Others look like a bone pine cone.

0:41:06.360 --> 0:41:08.000
<v Speaker 3>It's it's interesting.

0:41:08.880 --> 0:41:11.440
<v Speaker 1>Yeah, yeah, yeah, it does kind of look like interlocking

0:41:12.280 --> 0:41:12.960
<v Speaker 1>gear teeth.

0:41:13.040 --> 0:41:18.200
<v Speaker 3>Yeah, it's crazy. So the digestive system extracts nutrients from

0:41:18.239 --> 0:41:22.320
<v Speaker 3>this slurry, and then the parrotfish excretes what is left over,

0:41:22.600 --> 0:41:26.520
<v Speaker 3>which is a big part of which is sand. Because

0:41:26.520 --> 0:41:29.840
<v Speaker 3>they're grinding down this coral. They bite off and scrape

0:41:29.840 --> 0:41:32.920
<v Speaker 3>off pieces of coral, grind up that coral with the

0:41:33.040 --> 0:41:37.000
<v Speaker 3>nightmare throat teeth, and then they poop sand. So I've

0:41:37.000 --> 0:41:39.880
<v Speaker 3>read it described that if you swim around with these buddies,

0:41:40.000 --> 0:41:43.000
<v Speaker 3>you will see them just like letting out kind of

0:41:43.040 --> 0:41:46.480
<v Speaker 3>poofs of sand or blasting clouds of sand into the

0:41:46.480 --> 0:41:47.240
<v Speaker 3>water column.

0:41:47.520 --> 0:41:50.600
<v Speaker 1>Yeah. Absolutely, yeah, Like they're just they're kind of constantly

0:41:50.640 --> 0:41:52.880
<v Speaker 1>doing it. I mean, it makes sense. They're grazing and

0:41:53.000 --> 0:41:55.120
<v Speaker 1>they're kind of like goats, and they're kind of pooping

0:41:55.200 --> 0:41:57.520
<v Speaker 1>like goats, except it's coming out in this kind of

0:41:57.600 --> 0:42:00.640
<v Speaker 1>like puff of sand. And I know you included some

0:42:00.640 --> 0:42:02.560
<v Speaker 1>photos here where it's like more than a puff. It

0:42:02.600 --> 0:42:07.719
<v Speaker 1>looks like they're crop dusting. It's quite impressive.

0:42:08.840 --> 0:42:13.839
<v Speaker 3>In fact, parrotfish poop so much sand. They are by

0:42:13.920 --> 0:42:19.160
<v Speaker 3>themselves a significant source of the bioroosion of coral and

0:42:19.520 --> 0:42:24.600
<v Speaker 3>a significant source of fine grained white sand in certain environments,

0:42:25.239 --> 0:42:28.320
<v Speaker 3>as in, when you are walking along a beautiful white

0:42:28.320 --> 0:42:31.640
<v Speaker 3>sand beach on some tropical island, there is a very

0:42:31.680 --> 0:42:35.120
<v Speaker 3>good chance a large proportion of the sand under your

0:42:35.160 --> 0:42:37.040
<v Speaker 3>feet is parrotfish poop.

0:42:37.680 --> 0:42:41.840
<v Speaker 1>That's right. They are beach creation machines, and some of

0:42:41.840 --> 0:42:45.080
<v Speaker 1>the estimates for individual sand creation are quite stunning.

0:42:45.080 --> 0:42:47.680
<v Speaker 3>Unbelievable to me. Actually, Like I had no idea about

0:42:47.719 --> 0:42:50.080
<v Speaker 3>this going in, So you might be thinking, yeah, how

0:42:50.160 --> 0:42:53.200
<v Speaker 3>much sand can these fish really poop? Again? It depends

0:42:53.239 --> 0:42:56.799
<v Speaker 3>where you are. There are obviously other sand creation mechanisms

0:42:56.800 --> 0:42:58.840
<v Speaker 3>in the sea, so this is not the only one.

0:42:59.080 --> 0:43:03.000
<v Speaker 3>But in some place parrotfish are responsible for a lot

0:43:03.080 --> 0:43:06.040
<v Speaker 3>of the sand that's there. One example I came across

0:43:06.239 --> 0:43:09.400
<v Speaker 3>is a paper in the journal Geology from twenty fifteen

0:43:09.760 --> 0:43:14.000
<v Speaker 3>by Perry at All called Linking reef Ecology to island building.

0:43:14.400 --> 0:43:18.160
<v Speaker 3>Parrotfish identified as major producers for island building sediment in

0:43:18.239 --> 0:43:21.160
<v Speaker 3>the Maldives and so again this is by Perry at All,

0:43:22.040 --> 0:43:26.080
<v Speaker 3>and so the Maldives Archipelago. This is an island chain

0:43:26.160 --> 0:43:30.759
<v Speaker 3>that contains approximately twelve hundred individual reef islands, which are

0:43:30.800 --> 0:43:34.160
<v Speaker 3>islands that are made entirely out of sediment that is

0:43:34.200 --> 0:43:38.719
<v Speaker 3>produced from underwater coral reefs. So the primary reason these

0:43:38.760 --> 0:43:42.360
<v Speaker 3>islands exist is that there are coral reef ecosystems on

0:43:42.400 --> 0:43:46.280
<v Speaker 3>an underwater platform. Of course, the reefs themselves are mostly

0:43:46.320 --> 0:43:50.640
<v Speaker 3>made up of the calcium carbonate skeletons of stony coral polyps,

0:43:51.160 --> 0:43:55.600
<v Speaker 3>and over time these coral reefs decompose into sediments like

0:43:55.719 --> 0:43:59.800
<v Speaker 3>sand and gravel. Parry at All right quote all coral

0:43:59.800 --> 0:44:04.160
<v Speaker 3>reef islands are inherently dependent on their surrounding reef habitats

0:44:04.200 --> 0:44:07.360
<v Speaker 3>not only because they provide the foundations for island development,

0:44:07.600 --> 0:44:10.400
<v Speaker 3>but also because they are the primary production sites for

0:44:10.440 --> 0:44:15.200
<v Speaker 3>the sediments necessary to sustain island building, growth and maintenance.

0:44:15.719 --> 0:44:19.480
<v Speaker 3>So without sediments from the coral reefs decomposing into sand

0:44:19.520 --> 0:44:23.560
<v Speaker 3>and gravel, you may not have an island here. But

0:44:23.800 --> 0:44:26.839
<v Speaker 3>the authors of this study say before their research, how

0:44:26.960 --> 0:44:30.400
<v Speaker 3>exactly that sediment is produced from the coral reef is

0:44:30.440 --> 0:44:34.479
<v Speaker 3>poorly quantified, so they investigated they're looking at where does

0:44:34.560 --> 0:44:39.239
<v Speaker 3>the sediment come from, and they used the example of Vakaru,

0:44:39.400 --> 0:44:43.640
<v Speaker 3>which is an interior reef island in the Maldives. They

0:44:43.760 --> 0:44:46.799
<v Speaker 3>found that the area around this island produces about six

0:44:46.920 --> 0:44:50.000
<v Speaker 3>hundred and eighty five thousand kilograms of sediment per year,

0:44:50.400 --> 0:44:53.279
<v Speaker 3>about seventy five percent of which comes from a place

0:44:53.320 --> 0:44:56.480
<v Speaker 3>they call the outer reef flat. So if you look

0:44:56.480 --> 0:44:58.319
<v Speaker 3>at the island from above, you'll see the part that

0:44:58.400 --> 0:45:01.560
<v Speaker 3>rises above water and is forested and has plants and

0:45:01.560 --> 0:45:04.839
<v Speaker 3>all that, the beach surrounding it, and then there's sort

0:45:04.880 --> 0:45:09.200
<v Speaker 3>of an inner lagoon and then an inner reef ring

0:45:09.400 --> 0:45:11.840
<v Speaker 3>and an outer reef ring. So most of the sediment

0:45:11.880 --> 0:45:14.759
<v Speaker 3>is coming from that outer ring of coral reef environments

0:45:14.800 --> 0:45:18.480
<v Speaker 3>in the water, about seventy five percent of the sediment

0:45:18.560 --> 0:45:22.920
<v Speaker 3>comes from the outer reef flat. Now within that outer reef,

0:45:22.960 --> 0:45:25.640
<v Speaker 3>which creates about seventy five percent of the island's yearly

0:45:25.680 --> 0:45:29.160
<v Speaker 3>supply of new sand, the author's discovered that more than

0:45:29.360 --> 0:45:34.680
<v Speaker 3>eighty five percent of the sand is produced by parrotfish.

0:45:34.719 --> 0:45:37.120
<v Speaker 3>And if you're curious what the second place was. The

0:45:37.200 --> 0:45:40.480
<v Speaker 3>runner up producer of reef sand in a distant second

0:45:40.480 --> 0:45:42.759
<v Speaker 3>place at about eight point eight percent in the outer

0:45:42.840 --> 0:45:47.680
<v Speaker 3>reef is a type of macroalgy called halimata, which makes

0:45:47.719 --> 0:45:51.120
<v Speaker 3>like calcified body parts and then those get shed and

0:45:51.160 --> 0:45:54.640
<v Speaker 3>eventually decompose a breakdown into sand. But almost all of

0:45:54.640 --> 0:45:58.960
<v Speaker 3>it is coming from what the parrotfish excrete. So parrotfish

0:45:59.040 --> 0:46:04.600
<v Speaker 3>are continually defecating this island into existence, and they remain

0:46:04.719 --> 0:46:08.680
<v Speaker 3>critical for maintaining its existence the author's right quote. The

0:46:08.760 --> 0:46:12.440
<v Speaker 3>generation of sediments suitable for maintaining this reef island is

0:46:12.480 --> 0:46:15.960
<v Speaker 3>thus critically dependent on a narrow zone of high productivity reef,

0:46:16.239 --> 0:46:20.320
<v Speaker 3>but most especially on the maintenance of healthy parrotfish populations

0:46:20.719 --> 0:46:25.000
<v Speaker 3>that can convert reef framework to sand grade sediment, and

0:46:25.080 --> 0:46:29.840
<v Speaker 3>so the parrotfish are crucial for the health of island

0:46:29.960 --> 0:46:32.839
<v Speaker 3>environments like this. But this is not just true of

0:46:32.840 --> 0:46:36.000
<v Speaker 3>these tiny coral reef islands that are generated from coral

0:46:36.000 --> 0:46:39.920
<v Speaker 3>reef sediments, even on many other coasts and larger islands,

0:46:39.960 --> 0:46:42.080
<v Speaker 3>where the island itself might be, you know, have other

0:46:42.120 --> 0:46:44.920
<v Speaker 3>geological explanations, like it's not just sand rising out of

0:46:44.920 --> 0:46:47.319
<v Speaker 3>the water. It might be a volcanic island or the

0:46:47.320 --> 0:46:49.920
<v Speaker 3>coast of a continent or something. In places where there

0:46:49.920 --> 0:46:55.000
<v Speaker 3>are coral reefs, beaches in many cases are still largely

0:46:55.080 --> 0:47:01.160
<v Speaker 3>parrotfish lavatory constructions. A figure sighted in several reputable looking sources,

0:47:01.160 --> 0:47:04.080
<v Speaker 3>though I couldn't find the exact origin of it, is

0:47:04.120 --> 0:47:07.360
<v Speaker 3>that around seventy percent of the sand on the White

0:47:07.400 --> 0:47:12.640
<v Speaker 3>Sandy Beaches of Hawaii is parrotfish excretion. It's hard to imagine,

0:47:12.680 --> 0:47:15.520
<v Speaker 3>like you're walking on a beach or even on a

0:47:15.560 --> 0:47:21.000
<v Speaker 3>whole island, and to imagine it having a biological fish

0:47:21.120 --> 0:47:23.680
<v Speaker 3>digestive system origin of this kind.

0:47:24.200 --> 0:47:27.440
<v Speaker 1>I know, it's just it's crazy. It's one of those

0:47:27.520 --> 0:47:31.279
<v Speaker 1>mind blowing facts though that again, it gets pointed out

0:47:31.320 --> 0:47:35.240
<v Speaker 1>a lot when you are going to these places and snorkeling,

0:47:35.320 --> 0:47:37.520
<v Speaker 1>it becomes easy to sort of take for granted and

0:47:37.560 --> 0:47:39.399
<v Speaker 1>you have to sort of remind yourself. Then when you're

0:47:39.400 --> 0:47:41.640
<v Speaker 1>walking on the beach, it's like, no, for real, all

0:47:41.680 --> 0:47:44.920
<v Speaker 1>this sand and it's still kind of you know, beggars

0:47:44.920 --> 0:47:45.640
<v Speaker 1>the imagination.

0:47:46.080 --> 0:47:57.959
<v Speaker 3>Yeah. Now, another thing that's interesting is that, of course

0:47:57.960 --> 0:48:00.920
<v Speaker 3>we know now that parrotfishes are very important for the

0:48:01.360 --> 0:48:04.279
<v Speaker 3>for creating the sand that in some cases makes it

0:48:04.320 --> 0:48:06.840
<v Speaker 3>possible to have an island and like these reef island

0:48:06.920 --> 0:48:12.160
<v Speaker 3>environments or helps replenish the beaches. But you might think,

0:48:12.200 --> 0:48:15.240
<v Speaker 3>on the other hand, well, the parrotfishes are the enemy

0:48:15.320 --> 0:48:18.680
<v Speaker 3>of the coral reefs though, because they're preying on, you know,

0:48:18.920 --> 0:48:21.960
<v Speaker 3>the coral. They're like scrape in the coral. In fact,

0:48:22.160 --> 0:48:26.360
<v Speaker 3>it is thought that parrotfishes help protect coral reefs because

0:48:26.400 --> 0:48:29.240
<v Speaker 3>as they're going along taking bites out of the barrel

0:48:29.600 --> 0:48:32.000
<v Speaker 3>coral reefs, they might be leaving scars in them, biting

0:48:32.040 --> 0:48:37.120
<v Speaker 3>pieces off, taking chunks out, But by grazing in this way,

0:48:37.560 --> 0:48:42.480
<v Speaker 3>they prevent the reefs from becoming overgrown by things like

0:48:42.560 --> 0:48:46.640
<v Speaker 3>algae and other encrusting invertebrates like sponges and stuff. So

0:48:46.680 --> 0:48:49.360
<v Speaker 3>they may eat some coral as they munch along, but

0:48:49.480 --> 0:48:52.160
<v Speaker 3>overall they keep the coral reefs healthy.

0:48:52.880 --> 0:48:56.719
<v Speaker 1>That's right. This is a very important fact concerning like

0:48:56.840 --> 0:49:01.560
<v Speaker 1>necessary conservation for parrotfish because and it goes beyond that too,

0:49:01.640 --> 0:49:06.640
<v Speaker 1>Like I was reading that by constantly eating algae off

0:49:06.680 --> 0:49:10.320
<v Speaker 1>the coral. Again, they're constantly in doing this cleaning the coral,

0:49:10.400 --> 0:49:13.080
<v Speaker 1>creating new surfaces on the coral. And this is where

0:49:13.120 --> 0:49:17.320
<v Speaker 1>baby corals can attach and grow, so that's in play.

0:49:17.360 --> 0:49:20.640
<v Speaker 1>And on top of this, yeah, they're keeping like seaweed,

0:49:20.680 --> 0:49:23.759
<v Speaker 1>which remember is a microalgae. They're keeping seaweed growth in check.

0:49:25.600 --> 0:49:28.000
<v Speaker 1>And this is apparently one of the prime results of

0:49:28.040 --> 0:49:31.000
<v Speaker 1>parrotfish overfishing in parts of the Caribbean and the Pacific

0:49:31.400 --> 0:49:36.319
<v Speaker 1>seaweed overgrowth. And I was even reading this is from

0:49:36.480 --> 0:49:40.839
<v Speaker 1>Kramer at all. In twenty seventeen's prehistorical and historical declines

0:49:41.040 --> 0:49:45.360
<v Speaker 1>in Caribbean coral reef accretion rates driven by loss of parrotfish.

0:49:45.360 --> 0:49:48.760
<v Speaker 1>The authors here say that we see this connection proven

0:49:48.800 --> 0:49:53.200
<v Speaker 1>out in sediment fossils. There's a strong observable connection between

0:49:53.200 --> 0:49:57.600
<v Speaker 1>declines and coral accretion rates and parrotfish abundance. So and

0:49:57.640 --> 0:50:01.160
<v Speaker 1>it's more evidence that we need to conserve parrotfish in

0:50:01.239 --> 0:50:04.360
<v Speaker 1>order to help prevent coral reef environments from becoming quote,

0:50:04.600 --> 0:50:09.439
<v Speaker 1>algael dominated habitats. And yeah, so this is worth keeping

0:50:09.440 --> 0:50:12.600
<v Speaker 1>in mind. If you're traveling somewhere and parrotfish is on

0:50:12.680 --> 0:50:17.440
<v Speaker 1>the menu, it's advisable to eat something else. And indeed,

0:50:17.440 --> 0:50:19.800
<v Speaker 1>there are a number of efforts and protections in places

0:50:19.840 --> 0:50:23.520
<v Speaker 1>around the world to help protect these populations like the

0:50:23.520 --> 0:50:27.160
<v Speaker 1>parrotfish are a vital part of those coral environments which

0:50:27.160 --> 0:50:29.759
<v Speaker 1>are already threatened in a number of ways. This is

0:50:29.800 --> 0:50:33.080
<v Speaker 1>one that we can we can we can do a

0:50:33.080 --> 0:50:37.120
<v Speaker 1>lot to help coral reefs, but not eating parrotfish is

0:50:37.840 --> 0:50:40.520
<v Speaker 1>perhaps even more accessible than some of the things we

0:50:40.600 --> 0:50:42.080
<v Speaker 1>need to do to protect them.

0:50:42.320 --> 0:50:44.640
<v Speaker 3>Now, there's one more brief thing I wanted to get

0:50:44.680 --> 0:50:47.360
<v Speaker 3>into before we wrap up part one here, and that

0:50:47.480 --> 0:50:50.520
<v Speaker 3>is about the material makeup of parrotfish teeth. I was

0:50:50.560 --> 0:50:55.200
<v Speaker 3>reading about this in a press release for the Lawrence

0:50:55.239 --> 0:50:59.120
<v Speaker 3>Berkeley National Laboratory. This was published in twenty seventeen. It's

0:50:59.160 --> 0:51:02.480
<v Speaker 3>called X raysor Reveal the Biting Truth about Parrotfish Teeth

0:51:02.480 --> 0:51:05.919
<v Speaker 3>by Glenn Roberts, Junior. And so this is talking about

0:51:05.960 --> 0:51:10.480
<v Speaker 3>research conducted at the Berkeley Lab, which used X rays

0:51:10.480 --> 0:51:14.440
<v Speaker 3>to examine parrotfish teeth and better understand what makes them

0:51:14.520 --> 0:51:18.040
<v Speaker 3>so resilient in the face of essentially scraping, biting, and

0:51:18.120 --> 0:51:20.879
<v Speaker 3>chewing on rocks all day. You know, on these these

0:51:20.920 --> 0:51:24.400
<v Speaker 3>coral skeletons are are not soft, you know, they're hard

0:51:24.440 --> 0:51:28.440
<v Speaker 3>calcium carbonate, and they're just these teeth are relentlessly munching.

0:51:28.920 --> 0:51:32.320
<v Speaker 3>So the particular parrotfish species in question was the steep

0:51:32.360 --> 0:51:36.640
<v Speaker 3>head parrotfish also known as the blunt head parrotfish scientific

0:51:36.719 --> 0:51:42.280
<v Speaker 3>name Chlorurus micro rhinos. And in this analysis, the researchers

0:51:42.360 --> 0:51:46.400
<v Speaker 3>found that the resilience of prot parrotfish teeth was due

0:51:46.440 --> 0:51:52.960
<v Speaker 3>to this woven microstructure of minerals in the enameloid of

0:51:53.040 --> 0:51:55.680
<v Speaker 3>the teeth, and the article compares it in fact in

0:51:55.760 --> 0:51:59.920
<v Speaker 3>structure to chain mail, which I thought was interesting. So this,

0:52:00.000 --> 0:52:04.480
<v Speaker 3>this microstructure creates a tooth the material that is incredibly

0:52:04.600 --> 0:52:07.640
<v Speaker 3>hard at the biting surface. The article points out that

0:52:07.680 --> 0:52:11.040
<v Speaker 3>the hardness of the biting surface is about five hundred

0:52:11.080 --> 0:52:14.359
<v Speaker 3>and thirty tons of pressure per square inch and they

0:52:14.400 --> 0:52:19.600
<v Speaker 3>compare this to the weight of eighty eight African elephants

0:52:20.520 --> 0:52:24.560
<v Speaker 3>on a single square inch of space. Now that microstructure

0:52:24.680 --> 0:52:27.000
<v Speaker 3>of the teeth fits into a larger structure, the sort

0:52:27.040 --> 0:52:30.279
<v Speaker 3>of morphology of the jaw, which is that these parrotfish

0:52:30.360 --> 0:52:35.200
<v Speaker 3>have like fifteen rows of teeth totaling about one thousand teeth,

0:52:35.239 --> 0:52:39.279
<v Speaker 3>all fused together, biologically glued or cemented together into this

0:52:39.360 --> 0:52:44.000
<v Speaker 3>single beak like structure, and the stiffness of the underlying

0:52:44.040 --> 0:52:47.759
<v Speaker 3>mineral crystals increases as it goes toward the tip the

0:52:47.800 --> 0:52:51.480
<v Speaker 3>biting surface. And the article quotes one of the researchers

0:52:51.520 --> 0:52:55.840
<v Speaker 3>involved named PUPA. Gilbert, who is a professor in the

0:52:55.840 --> 0:52:59.720
<v Speaker 3>physics department at the University of Wisconsin Madison, who says, quote,

0:53:00.120 --> 0:53:03.480
<v Speaker 3>fish teeth are the coolest biominerals of all. They are

0:53:03.520 --> 0:53:06.560
<v Speaker 3>the stiffest, among the hardest, and the most resistant to

0:53:06.600 --> 0:53:11.000
<v Speaker 3>fracture and to abrasion ever measured. And so given the

0:53:11.160 --> 0:53:15.920
<v Speaker 3>incredible material qualities of these parrotfish teeth and beaks, researchers

0:53:15.920 --> 0:53:20.040
<v Speaker 3>are looking into ways that the woven crystals of parrotfish

0:53:20.080 --> 0:53:22.920
<v Speaker 3>teeth might be used as an inspiration for human engineering,

0:53:23.280 --> 0:53:26.520
<v Speaker 3>a design pattern that could be reproduced in synthetic materials

0:53:26.560 --> 0:53:28.759
<v Speaker 3>to create a tougher, more resilient product.

0:53:29.200 --> 0:53:32.040
<v Speaker 1>Now, just a couple of notes about these teeth for one.

0:53:32.000 --> 0:53:34.760
<v Speaker 1>On one hand, to come back to the alien xenomorph.

0:53:34.880 --> 0:53:37.560
<v Speaker 1>You know, it is interesting that they're sometimes described, at

0:53:37.640 --> 0:53:39.920
<v Speaker 1>least for some of the morphs, as possessing metal teeth,

0:53:40.520 --> 0:53:43.440
<v Speaker 1>and here we have the parrotfish, whose teeth are sometimes

0:53:43.480 --> 0:53:47.680
<v Speaker 1>described as being stronger than many metals metals, so it's

0:53:47.760 --> 0:53:52.080
<v Speaker 1>kind of interesting comparison there. Also, you know, inevitably there

0:53:52.160 --> 0:53:54.319
<v Speaker 1>is the question in the same way that we can't

0:53:54.360 --> 0:53:58.120
<v Speaker 1>look at a creature that is biting coral and you know,

0:53:58.200 --> 0:54:01.239
<v Speaker 1>think about our own teeth biting coral, we also can't

0:54:01.280 --> 0:54:03.840
<v Speaker 1>help but look at a creature with interesting teeth and

0:54:03.920 --> 0:54:06.879
<v Speaker 1>wonder what happens if I get bitten by one of these?

0:54:08.680 --> 0:54:11.560
<v Speaker 1>So I mean to be clear, you know, humans are

0:54:11.560 --> 0:54:15.120
<v Speaker 1>not on the menu for the parrotfish. There are accounts

0:54:15.120 --> 0:54:19.560
<v Speaker 1>of parrotfish rarely biting humans, though it does seem very rare,

0:54:20.120 --> 0:54:22.279
<v Speaker 1>and the incidents I was looking at, most of them

0:54:22.320 --> 0:54:25.080
<v Speaker 1>seem to be related to incidents with fishermen who were

0:54:25.120 --> 0:54:28.160
<v Speaker 1>actively harvesting them or you know, engaging with a trap

0:54:28.280 --> 0:54:34.560
<v Speaker 1>or something. But they have bitten humans before, so it

0:54:35.600 --> 0:54:37.560
<v Speaker 1>can happen. But I mean that can be said of

0:54:37.560 --> 0:54:39.560
<v Speaker 1>a lot of creatures, like you know, a horse can

0:54:39.600 --> 0:54:39.960
<v Speaker 1>bite you.

0:54:40.440 --> 0:54:42.959
<v Speaker 3>Oh lord, why did I google this? But I did?

0:54:43.080 --> 0:54:46.040
<v Speaker 1>Oh did you just google? You may have googled one

0:54:46.040 --> 0:54:46.879
<v Speaker 1>that comes up a lot.

0:54:47.239 --> 0:54:51.160
<v Speaker 3>Came across a news article that claims to be a

0:54:52.120 --> 0:54:54.680
<v Speaker 3>photo of a wound from somebody who was bitten by

0:54:54.680 --> 0:54:58.960
<v Speaker 3>a parrotfish, and it looks it's grotesque. Listeners be warned.

0:55:00.640 --> 0:55:03.080
<v Speaker 1>Yeah, there's a particular story that comes up in search

0:55:03.120 --> 0:55:06.120
<v Speaker 1>involving a fisherman, that is that was bitten in a

0:55:06.560 --> 0:55:10.799
<v Speaker 1>delicate area by one of these these parrotfish. So uh yeah,

0:55:10.840 --> 0:55:14.640
<v Speaker 1>I you know, weighed carefully if you decide to pursue these,

0:55:14.760 --> 0:55:17.680
<v Speaker 1>uh these stories for yourself. But yeah, it can happen,

0:55:17.800 --> 0:55:21.760
<v Speaker 1>it has happened, but uh, these are generally not considered

0:55:21.960 --> 0:55:25.680
<v Speaker 1>you know, risky fish, and people snorkel around them almost

0:55:25.800 --> 0:55:27.719
<v Speaker 1>constantly without issue.

0:55:27.840 --> 0:55:30.319
<v Speaker 3>They're not looking to bite you. They're they're just trying

0:55:30.360 --> 0:55:32.040
<v Speaker 3>to go about their business. They're scraping.

0:55:32.080 --> 0:55:35.040
<v Speaker 1>They're buzz't like bees, they have so much coral to scrape,

0:55:35.120 --> 0:55:39.960
<v Speaker 1>Like biting you takes time away from vital coral scraping time,

0:55:41.640 --> 0:55:43.480
<v Speaker 1>all right, well, we're gonna go and close up this

0:55:43.520 --> 0:55:47.280
<v Speaker 1>episode now, but we actually have even more exciting content

0:55:47.360 --> 0:55:53.920
<v Speaker 1>to cover about the parrotfish we didn't. We briefly mentioned their, their, their,

0:55:53.920 --> 0:55:56.560
<v Speaker 1>their sex changing ability, so we're going to get into

0:55:56.640 --> 0:55:59.000
<v Speaker 1>that for sure. Uh. There's also some other stuff that

0:55:59.040 --> 0:56:01.560
<v Speaker 1>will and I think in ways get us even closer

0:56:01.560 --> 0:56:03.120
<v Speaker 1>to that xenomorpha area again.

0:56:03.640 --> 0:56:07.080
<v Speaker 3>So yeah, we're gonna have some cocoonings, some all kinds

0:56:07.120 --> 0:56:08.560
<v Speaker 3>of good stuff to get into next time.

0:56:08.880 --> 0:56:11.280
<v Speaker 1>Yeah, yeah, so tune in for that. In the meantime,

0:56:11.800 --> 0:56:13.879
<v Speaker 1>I love to hear from anyone else out there who

0:56:13.920 --> 0:56:19.360
<v Speaker 1>has personal experience being around parrotfish. You know, we're not

0:56:19.480 --> 0:56:22.680
<v Speaker 1>encouraging anyone to actively seek out and eat parrotfish, but

0:56:22.960 --> 0:56:25.719
<v Speaker 1>you know, it has been a tradition of cuisines. So

0:56:26.200 --> 0:56:28.279
<v Speaker 1>if you would like to ride in and share your

0:56:28.400 --> 0:56:32.839
<v Speaker 1>culinary experience with parrotfish, If you have tasted a parrotfish liver, yes,

0:56:32.920 --> 0:56:35.040
<v Speaker 1>we would like to know what that is like that

0:56:36.520 --> 0:56:38.960
<v Speaker 1>We just would like to know. We'd like to know

0:56:38.960 --> 0:56:42.279
<v Speaker 1>what the Romans were into when they were consuming their

0:56:42.320 --> 0:56:44.800
<v Speaker 1>parrot fish meals. So write in. It's all fair game

0:56:45.320 --> 0:56:47.080
<v Speaker 1>as always, you know, if you have. When you do

0:56:47.160 --> 0:56:49.560
<v Speaker 1>write into us, you can always flag something is and

0:56:49.600 --> 0:56:51.279
<v Speaker 1>say hey, don't use my name on this, I want

0:56:51.280 --> 0:56:53.759
<v Speaker 1>it to be anonymous. Or you can say hey, this

0:56:53.840 --> 0:56:57.160
<v Speaker 1>is information for you, but don't actually read this. That's

0:56:57.160 --> 0:56:59.520
<v Speaker 1>fair as well. Just write in. We would love to

0:56:59.560 --> 0:57:02.120
<v Speaker 1>hear from you. Just a reminder that Stuff to Blow

0:57:02.160 --> 0:57:04.319
<v Speaker 1>Your Mind is primarily a science and culture podcast, with

0:57:04.360 --> 0:57:07.360
<v Speaker 1>core episodes on Tuesdays and Thursdays, listener mail on Mondays,

0:57:07.560 --> 0:57:10.120
<v Speaker 1>short form episode on Wednesdays, and on Fridays. We set

0:57:10.160 --> 0:57:12.120
<v Speaker 1>aside most serious concerns to just talk about a weird

0:57:12.160 --> 0:57:13.680
<v Speaker 1>film on Weird House Cinema.

0:57:13.880 --> 0:57:17.600
<v Speaker 3>Huge thanks as always to our excellent audio producer JJ Posway.

0:57:17.840 --> 0:57:19.360
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0:57:19.360 --> 0:57:21.920
<v Speaker 3>with feedback on this episode or any other, to suggest

0:57:21.920 --> 0:57:23.960
<v Speaker 3>a topic for the future, or just to say hello,

0:57:24.320 --> 0:57:26.880
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0:57:26.920 --> 0:57:35.680
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0:57:35.760 --> 0:57:38.680
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