WEBVTT - The Manta Ray, Part 1

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<v Speaker 1>Welcome to Stuff to Blow Your Mind production of iHeartRadio.

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<v Speaker 2>Hey you welcome to Stuff to Blow Your Mind. My

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<v Speaker 2>name is Robert Lamb, and I am Joe McCormick. In

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<v Speaker 2>this episode, we're going to begin our look at the

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<v Speaker 2>manta ray because I very recently had the privilege to

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<v Speaker 2>travel with my family to Raja Ampat in Indonesia for

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<v Speaker 2>a week of snorkeling. And during that snorkeling, I got

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<v Speaker 2>to observe manta rays while in the water snorkeling, and

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<v Speaker 2>it was just a mind blowing experience. It was just magical.

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<v Speaker 2>I can't quite put it into words exactly, but it

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<v Speaker 2>was one of these situations where as I was snorkeling

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<v Speaker 2>out with the other snorkelers towards this manta ray cleaning station,

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<v Speaker 2>I found myself like mouthing, oh my god, oh my

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<v Speaker 2>God through my breathing apparatus.

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<v Speaker 3>The cleaning station is that, do I understand right? That's

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<v Speaker 3>a place where they come to sort of be be

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<v Speaker 3>swarmed by fish that will help get parasites or other

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<v Speaker 3>kind of contaminants off of their bodies.

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<v Speaker 2>Correct. This is this is pretty remarkable in its own right,

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<v Speaker 2>and I think we'll get into that more in the

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<v Speaker 2>second episode of this series. But yes, that's what we

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<v Speaker 2>were observing. These were some reef manta rays that had

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<v Speaker 2>come out to the cleaning station so that these various

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<v Speaker 2>fish could eat their parasites. And yeah, it was just

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<v Speaker 2>magical to watch these creatures move through the water like

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<v Speaker 2>some sort of animate black and white cape, you know,

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<v Speaker 2>some sort of an angel or demon, just something almost

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<v Speaker 2>beyond our ability to comprehend.

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<v Speaker 3>It's a bach coming in on the organ as they

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<v Speaker 3>swish around.

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<v Speaker 2>Yeah. Yeah, they're very, very dramatic, but also, as we'll

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<v Speaker 2>be discussing, relatively drama free at least as far as

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<v Speaker 2>what they're doing and what they're bringing to the table.

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<v Speaker 2>There's a lot of manta ray drama, but it's it's

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<v Speaker 2>almost entirely on us, the humans. Yeah. So I want

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<v Speaker 2>to mention up here at the top that we did

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<v Speaker 2>this snorkling at the Missoul Marine Reserve. This is also

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<v Speaker 2>where you find the Missoul Resort. The resort is just

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<v Speaker 2>one leg of the overall conservation mission here, which actually

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<v Speaker 2>started before the tourism part of the operation, like the

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<v Speaker 2>tourism part apparently was then built up afterwards to fund

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<v Speaker 2>the conservation mission, and I can't say enough good things

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<v Speaker 2>about this place. Founded on the side of a former

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<v Speaker 2>shark finning camp and in an area that had been

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<v Speaker 2>previously targeted by illegal lumber operations and dynamite fishing, and

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<v Speaker 2>now through the Missoul Foundation, they manage about three hundred

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<v Speaker 2>thousand acres or twelve two hundred square kilometers of marine

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<v Speaker 2>reserve with two distinct no take zones. They engage in

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<v Speaker 2>various conservation efforts, such as the Missoul Manta Program, a

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<v Speaker 2>reshark program, and this includes a program to reintroduce Indo

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<v Speaker 2>Pacific leopard sharks, and they partner with various organizations of

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<v Speaker 2>various like aquariums around the world old who have the

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<v Speaker 2>right eggs egg secs to reintroduce and their partners include

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<v Speaker 2>Atlanta's own Georgia Aquarium. They're also involved in coral reef restoration,

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<v Speaker 2>sustainability efforts in various community outreach and education programs.

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<v Speaker 3>So you said you were doing a lot of snorkeling here.

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<v Speaker 3>I know y'all are a snorkeling family, right, I have

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<v Speaker 3>no experience with this.

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<v Speaker 2>Yeah, yeah, my wife got us into it, and you know,

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<v Speaker 2>we'll go on snorkeling excursions here and there, and I

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<v Speaker 2>have to say, yeah, this is the best snorkeling of

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<v Speaker 2>my life thus far. This part of the world is

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<v Speaker 2>in what's known as the Coral Triangle. This is an

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<v Speaker 2>incredibly rich and diverse marine environment that happens to include,

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<v Speaker 2>according to the NOAA, quote, over six hundred reef building

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<v Speaker 2>coral species, seventy five percent of all species known to science,

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<v Speaker 2>three thousand species of reef fish, forty percent of the

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<v Speaker 2>world's coral reef species, and six of the world's seven

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<v Speaker 2>marine turtle species. Also three quarters of known molluscs.

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<v Speaker 3>So it's happening.

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<v Speaker 2>Yeah, it's yeah, just a very very rich place. And

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<v Speaker 2>you know, I'll no doubt come back to other things

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<v Speaker 2>I observed there in future episodes. But one of the

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<v Speaker 2>many highlights again was getting to observe these reef manta

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<v Speaker 2>rays in the wild. So we'll get back to the

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<v Speaker 2>details of the different the two main different manta species,

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<v Speaker 2>but this is the second largest of the rays and

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<v Speaker 2>one of only two possibly three extant manta ray species.

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<v Speaker 2>They can weigh up to fifteen hundred pounds or seven

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<v Speaker 2>hundred kilograms, and that's with a maximum disc width of

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<v Speaker 2>fifteen feet or four hundred and fifty centimeters if you were.

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<v Speaker 2>I guess you could sort of frame that as their

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<v Speaker 2>wingspan if you want.

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<v Speaker 3>But you said, so, these are the reef mantas, and

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<v Speaker 3>the largest of the manta rays would be the giant

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<v Speaker 3>oceanic mantas.

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<v Speaker 2>Correct. Yeah, and we'll come back to the stats on

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<v Speaker 2>them in a minute. But yeah, in both cases, great

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<v Speaker 2>bat like black and white creatures that seem to glide

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<v Speaker 2>and soar through the depths. And I think I had

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<v Speaker 2>observed some in the water while standing on a sandbar

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<v Speaker 2>elsewhere in the world previously, but this was my first

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<v Speaker 2>and only time getting to see them while in the water,

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<v Speaker 2>and again it was just astounding.

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<v Speaker 3>So I have no experience with snorkeling, but in reading

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<v Speaker 3>up for this episode, I just kept coming across firsthand

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<v Speaker 3>descriptions again and again of how strange and amazing it

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<v Speaker 3>was to be in the water with manta rays. A

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<v Speaker 3>common thing these divers and researchers talk about is a

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<v Speaker 3>feeling of kind of intelligent or almost emotional connection with

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<v Speaker 3>the animal that they have not experienced with any other fish. Because,

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<v Speaker 3>to be clear, the manta is not like a mammal

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<v Speaker 3>like dolphins or whales might be that you might be

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<v Speaker 3>more you know, disposed, you might have more experience hearing

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<v Speaker 3>about these kind of connections people have with marine mammals.

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<v Speaker 3>But these are fish, you know, we think of them

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<v Speaker 3>as these very kind of cold creatures of limited intelligence,

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<v Speaker 3>kind of like sharks that seem to be mainly just

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<v Speaker 3>kind of machines acting on impulse. They don't have that

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<v Speaker 3>feeling of emotion and intelligence you might get from a mammal.

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<v Speaker 3>But in this case, this is a fish that lots

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<v Speaker 3>of people say, does it does have that feeling. It's

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<v Speaker 3>like it's there and it's alive and it's thinking.

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<v Speaker 2>Yeah, this is a great point. And I think we'll

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<v Speaker 2>probably get into the intel, the brain, the intelligence of

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<v Speaker 2>the manta ray, especially in the next episode. But but

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<v Speaker 2>you do see this observation a lot. There seems to

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<v Speaker 2>be a curiosity on the part of the manta, and

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<v Speaker 2>in many ways, this kind of curiosity reminds us of

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<v Speaker 2>our interactions with mammalian marine species like dolphins and whales. Now,

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<v Speaker 2>in the case of our own experiences, I want to

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<v Speaker 2>stress that we observe them while snorkeling, rather than say

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<v Speaker 2>that we swam with them. I guess you could technically

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<v Speaker 2>say we swam them with them. We're in the same

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<v Speaker 2>button body of water with them, but we did keep

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<v Speaker 2>our distance. We did not chase the manta rays, and

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<v Speaker 2>we certainly did not attempt attempt to touch these gentle

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<v Speaker 2>giants of the sea.

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<v Speaker 3>I assume that's discouraged.

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<v Speaker 2>It is discouraged, yes, And in discussing this, like the

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<v Speaker 2>human desire to touch the manta ray, I wanted to

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<v Speaker 2>get into a preliminary discussion here about the human attitudes

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<v Speaker 2>toward the manta ray because this is important because ultimately

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<v Speaker 2>human attitudes towards the manta rays also plays into their

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<v Speaker 2>endangered status in the world, certainly with the oceanic man

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<v Speaker 2>manta so manta rays enjoy a pretty wide range. They're

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<v Speaker 2>found in warm, temperate, subtropical and tropical waters around the world.

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<v Speaker 2>As such, humans and coastal areas within their range have

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<v Speaker 2>known about them for a very long time. Hawaiian, Micronesian,

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<v Speaker 2>Southeast Asian, and South American traditions have viewed the manta

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<v Speaker 2>in varying supernatural life, as reincarnations of human souls, as

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<v Speaker 2>avatars of a creator deity, as divine protectors, as divine messengers,

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<v Speaker 2>and as such, they've even enjoyed traditional protected status amongst

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<v Speaker 2>certain groups, at least at different times. But there's also

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<v Speaker 2>a darker side to human attitudes toward manta rays. Over

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<v Speaker 2>the past couple of decades, the demand for manta ray

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<v Speaker 2>gill plates in traditional medicine, particularly traditional Chinese medicine, has

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<v Speaker 2>proven devastating for manta ray populations. Based on the unproven

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<v Speaker 2>and to be clear of pseudoscientific idea, the consumption of

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<v Speaker 2>these gills in some sort of like powdered driver and

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<v Speaker 2>or powdered form can boost the human immune system, among

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<v Speaker 2>other supposed benefits, and the story of how this is

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<v Speaker 2>really interesting in its own right. I was reading about

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<v Speaker 2>this in a paper by O'Malley at All titled characterization

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<v Speaker 2>of the Trade in Manta and Devil ray gill plates

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<v Speaker 2>in China and Southeast Asia through Trader Surveys, published in

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<v Speaker 2>twenty sixteen in Aquatic Conservation, Marine and Freshwater Ecosystems, and

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<v Speaker 2>they point out that mention of manta gill plates didn't

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<v Speaker 2>pop up in traditional Chinese medicine publications until around nineteen

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<v Speaker 2>seventy six. This to be clear, despite the fact that

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<v Speaker 2>traditional Chinese medicine itself is very very old, going back

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<v Speaker 2>like five thousand years, a widespread and popular form of

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<v Speaker 2>alternative medicine. But the consumption of these gill plates is

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<v Speaker 2>not some sort of deep seated tradition in this alternative

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<v Speaker 2>medicine practice.

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<v Speaker 3>This would not be the only case that something is

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<v Speaker 3>presented as a traditional or ancient cure from some culture

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<v Speaker 3>or other when it is not. It is a fairly

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<v Speaker 3>recent thing people have started doing.

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<v Speaker 2>Yeah. One of my key sources for these episodes is

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<v Speaker 2>twenty eighteen's Guide to the Manta and Devil Rays of

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<v Speaker 2>the World by Stevens, Fernando Dan, and Dyscaria. And in

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<v Speaker 2>this book, which I'll keep coming back to, they say

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<v Speaker 2>that this was all likely a quote clever marketing of

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<v Speaker 2>a readily available and cheap bycatch product. So, in other words,

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<v Speaker 2>various unsustainable fishing practices would be pulling mantas in any way,

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<v Speaker 2>and then they're like, well, let's market the parts of

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<v Speaker 2>this creature and sell it. And then as popularity builds,

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<v Speaker 2>it translates into direct targeting of mantas by what they

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<v Speaker 2>describe as boom and bust fisheries. So for reasons we'll

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<v Speaker 2>discuss in these episodes. These are vulnerable species that do

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<v Speaker 2>not easily endure this sort of targeted fishing, so these

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<v Speaker 2>operations inherently produce very short lived paydays while doing long

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<v Speaker 2>term damage to the populations. They also note that the

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<v Speaker 2>rise in popularity may also tie in with the rise

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<v Speaker 2>in human respiratory illnesses do in part to pollution, and

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<v Speaker 2>again these pseudoscientific claims. Basically, we're dealing with the idea that, Okay,

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<v Speaker 2>the these are filters for the fish, and therefore, on

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<v Speaker 2>some level, if I consume them, it's going to help

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<v Speaker 2>filter me out as well, it's going to protect me

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<v Speaker 2>from the things that would harm me in the environment.

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<v Speaker 2>So again, gill plates would seem to be a relatively

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<v Speaker 2>recent addition to traditional Chinese medicine and one that has

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<v Speaker 2>had a marked impact on the populations of these vulnerable

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<v Speaker 2>fish species. The reef manta is currently flagged as vulnerable,

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<v Speaker 2>while the giant oceanic manta is endangered.

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<v Speaker 3>And I would imagine that we can come back to

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<v Speaker 3>this because I'm sure there's more nuance, but I would

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<v Speaker 3>imagine that they are especially vulnerable to heavy fishing and

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<v Speaker 3>harvesting because they're larger species that have a slower reproductive

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<v Speaker 3>schedule exactly.

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<v Speaker 2>And then historically, on top of all of this, there

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<v Speaker 2>are Western European misconceptions and myths about manta and devil rays,

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<v Speaker 2>rooted apparently in the observations of sailors, but managing to

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<v Speaker 2>survive well into the early twentieth century and manifesting in

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<v Speaker 2>written fiction as well as in at least a couple

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<v Speaker 2>of early horror films.

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<v Speaker 3>Yes, so, Rob, at your suggestion, I looked these up.

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<v Speaker 3>You sort of gave me an assignment here, and I

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<v Speaker 3>checked these movies out. Strangely, both of these made in

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<v Speaker 3>the nineteen thirties, you know, I think of the seventies

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<v Speaker 3>through the nineties as kind of the heyday of oh,

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<v Speaker 3>I don't know, killer Monster in the Ocean movies. Of course,

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<v Speaker 3>following Jaws, Jaws is the big one, and then you

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<v Speaker 3>get all the Jaws copycats, you know, Orca and everything

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<v Speaker 3>like that, and then even further down the chain into

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<v Speaker 3>like the real kind of Z grade copycats. You know,

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<v Speaker 3>in the nineties and two thousands there were just ten

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<v Speaker 3>billion direct to video shark movies made.

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<v Speaker 2>Yeah, that's that is a great observation, especially since what

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<v Speaker 2>is it fifty years of jobs now celebrating a major birthday.

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<v Speaker 3>But yeay, we I mean, you can't deny the power

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<v Speaker 3>of Jaws. Like, as much as I hate to contribute

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<v Speaker 3>to the demonizing of e ocean creatures, Jaws is just

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<v Speaker 3>a banger. It's a great movie.

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<v Speaker 2>It is. It's a great film. It changed movies forever.

0:13:13.080 --> 0:13:15.719
<v Speaker 2>You can't talk about blockbusters without talking about Jaws. You

0:13:15.760 --> 0:13:19.760
<v Speaker 2>can't talk about monster movies really without talking about Jaws.

0:13:20.559 --> 0:13:22.880
<v Speaker 2>But it is interesting in pointing out that films like

0:13:22.960 --> 0:13:26.480
<v Speaker 2>Jaws arise in the nineteen seventies and then various other

0:13:26.520 --> 0:13:29.920
<v Speaker 2>creatures are drawn into the mix. But the seventies seem

0:13:30.000 --> 0:13:34.520
<v Speaker 2>to be the time period during which in the Europeans

0:13:34.520 --> 0:13:37.280
<v Speaker 2>in the West woke up to the idea that, oh yeah,

0:13:37.320 --> 0:13:40.319
<v Speaker 2>manta rays are fine. They're like absolutely not threatening anybody.

0:13:40.360 --> 0:13:43.760
<v Speaker 2>Not only are they not threatening, not actually threatening. It's

0:13:43.760 --> 0:13:46.400
<v Speaker 2>hard to conceive of them being threatening, Like, we can't

0:13:46.440 --> 0:13:50.200
<v Speaker 2>even think about making a monster movie about something so tame.

0:13:50.240 --> 0:13:52.280
<v Speaker 2>We'll make one about the killer rabbits first.

0:13:52.559 --> 0:13:54.679
<v Speaker 3>I feel like the stuff you would get later, like

0:13:54.720 --> 0:13:58.360
<v Speaker 3>in the eighties is movies that had friendly aliens that

0:13:58.400 --> 0:14:02.040
<v Speaker 3>were basically manter ray shape. I can't even remember what

0:14:02.080 --> 0:14:04.280
<v Speaker 3>movie I'm thinking of, but I can picture it in

0:14:04.280 --> 0:14:08.880
<v Speaker 3>my mind, like a gentle, sort of illuminated, bioluminescent, floating

0:14:08.920 --> 0:14:12.040
<v Speaker 3>manta ray with intelligence. That's like communicating with a child

0:14:12.160 --> 0:14:14.679
<v Speaker 3>or something. Does that ring any bells for you who

0:14:15.360 --> 0:14:15.680
<v Speaker 3>that one?

0:14:15.720 --> 0:14:19.000
<v Speaker 2>Not specifically, but I was reading doing some additional reading,

0:14:19.000 --> 0:14:22.120
<v Speaker 2>and there are various examples of creatures in sci fi

0:14:22.640 --> 0:14:24.840
<v Speaker 2>that say, live in the atmosphere of Jupiter. They're at

0:14:24.920 --> 0:14:28.960
<v Speaker 2>least partially based on the mantray. Oh, Like, it just

0:14:29.000 --> 0:14:32.440
<v Speaker 2>has a pleasing ethereal form. Again, it's like to the

0:14:32.480 --> 0:14:34.920
<v Speaker 2>point where it's almost hard for us to put ourselves

0:14:34.920 --> 0:14:38.000
<v Speaker 2>in the mindset of someone who sees a manta ray

0:14:38.040 --> 0:14:40.360
<v Speaker 2>and thinks about it as a relentless killer.

0:14:40.840 --> 0:14:42.840
<v Speaker 3>Oh the Jupiter when you mentioned rang a bell because

0:14:42.880 --> 0:14:44.760
<v Speaker 3>we just talked about the story in our series on

0:14:44.840 --> 0:14:48.480
<v Speaker 3>the Great Storm the Big Red Spot of Jupiter, because

0:14:48.520 --> 0:14:51.200
<v Speaker 3>that was in a meeting with Medusa by Arthur C. Clark.

0:14:51.160 --> 0:14:53.280
<v Speaker 3>One of the aliens they meet there is like a

0:14:53.280 --> 0:14:56.280
<v Speaker 3>giant manta ray in the atmosphere of Jupiter. But anyway,

0:14:56.320 --> 0:14:57.720
<v Speaker 3>we got it, okay, So we got to talk about

0:14:57.720 --> 0:15:01.240
<v Speaker 3>these manta horror movies from the nineteenth thirties, neither of

0:15:01.240 --> 0:15:04.560
<v Speaker 3>which exactly lives up to that promise, but they're both

0:15:04.640 --> 0:15:07.720
<v Speaker 3>kind of marketed that way. So one of these movies

0:15:07.840 --> 0:15:12.680
<v Speaker 3>is called The Sea Bat Sea, not c the letter

0:15:12.720 --> 0:15:16.400
<v Speaker 3>Sea Bat Sea Bat From nineteen thirty This is a

0:15:16.440 --> 0:15:22.080
<v Speaker 3>pre code American romantic melodrama directed by Wesley Ruggles. Apparently,

0:15:22.200 --> 0:15:26.760
<v Speaker 3>in early production, Todd Browning was somehow attached to this,

0:15:26.880 --> 0:15:29.320
<v Speaker 3>and it was maybe supposed to be a vehicle featuring

0:15:29.680 --> 0:15:33.160
<v Speaker 3>Lon Cheney, but that never worked out. So this was

0:15:33.160 --> 0:15:36.840
<v Speaker 3>directed by Wesley Ruggles, shot in Mexico, starring Charles Bickford,

0:15:36.960 --> 0:15:40.840
<v Speaker 3>Raquel Torres, and Nil's Astor, and it even has Boris

0:15:40.920 --> 0:15:43.480
<v Speaker 3>Karloff in a small role. This came out a year

0:15:43.520 --> 0:15:46.680
<v Speaker 3>before Karloff's big break in Frankenstein that was thirty one.

0:15:47.640 --> 0:15:50.440
<v Speaker 3>So this is set on an island in the Caribbean

0:15:50.720 --> 0:15:54.000
<v Speaker 3>and the story follows a character named Nina played by

0:15:54.080 --> 0:15:57.960
<v Speaker 3>Mexican actress Raquel Torres, who is either in love with

0:15:58.360 --> 0:16:01.520
<v Speaker 3>or is the sister of, depending on which synopsis you read.

0:16:01.560 --> 0:16:05.240
<v Speaker 3>I was not able to watch this movie before recording today.

0:16:05.560 --> 0:16:07.480
<v Speaker 3>Is either in love with or is the sister of

0:16:07.600 --> 0:16:11.600
<v Speaker 3>a sponge diver named Carl. Sadly, Carl is killed when

0:16:11.600 --> 0:16:15.600
<v Speaker 3>his diving party is attacked by a dreaded local creature

0:16:15.720 --> 0:16:19.320
<v Speaker 3>known as the sea bat, and this is described in

0:16:19.400 --> 0:16:22.560
<v Speaker 3>some sources as a giant manta ray, in other sources

0:16:22.600 --> 0:16:26.440
<v Speaker 3>as a sting ray, which, as we'll discuss more throughout

0:16:26.440 --> 0:16:29.040
<v Speaker 3>the series, that those are not the same thing, though

0:16:29.200 --> 0:16:32.520
<v Speaker 3>some publications describing the movie seem not to recognize that

0:16:32.560 --> 0:16:34.480
<v Speaker 3>there is a difference. I think they just think, like

0:16:34.560 --> 0:16:39.320
<v Speaker 3>mantray's our stingrays same thing. In some effects shots, you

0:16:39.360 --> 0:16:41.960
<v Speaker 3>can see it really doesn't look like either. One rob

0:16:42.000 --> 0:16:45.040
<v Speaker 3>I put one screenshot in here for you. There are

0:16:45.120 --> 0:16:48.160
<v Speaker 3>shots of it underwater where it I don't know, it's

0:16:48.160 --> 0:16:51.200
<v Speaker 3>shaped kind of like an airplane or like a spaceship

0:16:51.240 --> 0:16:54.320
<v Speaker 3>of some kind. And then there are some shots where

0:16:54.320 --> 0:16:56.520
<v Speaker 3>you see it at the water line and it looks

0:16:56.600 --> 0:17:00.760
<v Speaker 3>just more like a giant shark or tuna type creature. Anyway,

0:17:00.800 --> 0:17:04.760
<v Speaker 3>After the tragic loss of Carl in this sea bat

0:17:04.800 --> 0:17:08.600
<v Speaker 3>related incident, the character Nina starts getting into voodoo and

0:17:08.600 --> 0:17:11.200
<v Speaker 3>then declares that she will marry any man who can

0:17:11.280 --> 0:17:14.680
<v Speaker 3>kill the dreaded sea bat. Several men try and fail

0:17:14.800 --> 0:17:18.440
<v Speaker 3>and then eventually a traveling preacher named Reverend Sims comes

0:17:18.440 --> 0:17:21.560
<v Speaker 3>to town. This is Charles Bickford, and he somehow both

0:17:21.760 --> 0:17:24.919
<v Speaker 3>converts Nina to Christianity. He leads her out of her

0:17:24.960 --> 0:17:28.560
<v Speaker 3>pact with Voodoo and falls in love with her. And

0:17:28.600 --> 0:17:31.159
<v Speaker 3>it's a tragic romance, I guess, or I don't know

0:17:31.160 --> 0:17:33.439
<v Speaker 3>how tragic. I think they do end up happily together

0:17:33.480 --> 0:17:35.879
<v Speaker 3>at the end. But there is a twist because it

0:17:35.920 --> 0:17:39.879
<v Speaker 3>turns out Reverend Sims is actually an escaped convict pretending

0:17:39.920 --> 0:17:42.920
<v Speaker 3>to be a minister. And then some of Nina's other

0:17:43.160 --> 0:17:45.679
<v Speaker 3>jealous suitors try to capture him and turn him in

0:17:45.720 --> 0:17:48.040
<v Speaker 3>for the bounty. But on the way there, they're like

0:17:48.119 --> 0:17:50.399
<v Speaker 3>on a boat, and the boat gets attacked by the

0:17:50.400 --> 0:17:53.600
<v Speaker 3>sea bat so they get sea batted, but Reverend Sims

0:17:53.640 --> 0:17:56.000
<v Speaker 3>survives and he goes back to Nina and they I

0:17:56.000 --> 0:17:58.600
<v Speaker 3>guess they live happily ever after. That's what I could

0:17:58.600 --> 0:18:03.000
<v Speaker 3>piece together reading various nazis online from the American Film

0:18:03.080 --> 0:18:05.800
<v Speaker 3>Institute Catalog's historical entry on the movie. I just wanted

0:18:05.800 --> 0:18:09.400
<v Speaker 3>to read a couple of production notes because they factor

0:18:09.400 --> 0:18:14.439
<v Speaker 3>into the Stingray or Manta Ray discussion quote. According to

0:18:14.480 --> 0:18:17.119
<v Speaker 3>the Telegraph News. The movie, with its crew of sixty

0:18:17.200 --> 0:18:20.760
<v Speaker 3>two personnel, was quote believed to be the largest motion

0:18:20.920 --> 0:18:24.919
<v Speaker 3>picture expedition to leave Hollywood for another American country. The

0:18:24.960 --> 0:18:28.560
<v Speaker 3>production required three pullmans and two baggage cars with two

0:18:28.680 --> 0:18:32.119
<v Speaker 3>hundred tons of equipment, and an inventory of articles taken

0:18:32.160 --> 0:18:35.040
<v Speaker 3>into Mexico under customs bond covered by more than one

0:18:35.080 --> 0:18:38.880
<v Speaker 3>thousand pages and showed a total value of eighty thousand dollars.

0:18:39.000 --> 0:18:42.320
<v Speaker 3>The article also claimed that the titular subject of the film,

0:18:42.560 --> 0:18:46.239
<v Speaker 3>the Giant Stingray, was filmed for the first time in

0:18:46.280 --> 0:18:46.920
<v Speaker 3>the sea bat.

0:18:48.640 --> 0:18:51.560
<v Speaker 2>The giant stingray. Now, I'm not sure where that would

0:18:51.560 --> 0:18:54.879
<v Speaker 2>be that there is a giant freshwater stingray, but I

0:18:54.920 --> 0:18:56.919
<v Speaker 2>think this is a creature you find in touch tanks.

0:18:56.960 --> 0:19:00.280
<v Speaker 2>This is not in captivity. I don't think this is

0:19:00.280 --> 0:19:03.120
<v Speaker 2>something that is going to be that threatening.

0:19:03.640 --> 0:19:05.879
<v Speaker 3>And once again, like I said, I couldn't watch the

0:19:05.920 --> 0:19:08.439
<v Speaker 3>whole movie, but in the clips I saw there were

0:19:08.480 --> 0:19:11.479
<v Speaker 3>two different ways the sea bat looked, and neither of

0:19:11.520 --> 0:19:14.600
<v Speaker 3>them looked like a real animal anyway.

0:19:15.359 --> 0:19:16.240
<v Speaker 2>Not clear if.

0:19:16.119 --> 0:19:19.080
<v Speaker 3>Anybody involved here knew the difference between a stingray and

0:19:19.119 --> 0:19:23.119
<v Speaker 3>a manta ray, which is rob Cee if you follow

0:19:23.160 --> 0:19:25.640
<v Speaker 3>me here, I think that's somewhat comparable to the difference

0:19:25.640 --> 0:19:28.400
<v Speaker 3>between like a great white shark and a whale shark,

0:19:28.800 --> 0:19:31.920
<v Speaker 3>like pretty different organisms. One's a filter feeder, the others

0:19:31.920 --> 0:19:33.680
<v Speaker 3>a predator, right right.

0:19:33.720 --> 0:19:35.520
<v Speaker 2>And even then with the sting ray, I think there's

0:19:35.600 --> 0:19:38.360
<v Speaker 2>depending on what type of stingray, you have different forms

0:19:38.359 --> 0:19:39.760
<v Speaker 2>of feeding that are taking place.

0:19:39.800 --> 0:19:43.640
<v Speaker 3>But yeah, essentially, many reviewers of Sea Bat also say

0:19:43.800 --> 0:19:49.439
<v Speaker 3>not enough Sea Bat. Sea Bat sequences are limited, and yeah,

0:19:49.480 --> 0:19:51.439
<v Speaker 3>so in the in the scene I did see of

0:19:51.480 --> 0:19:53.800
<v Speaker 3>it chasing the boat, it's like attacking the boat as

0:19:53.800 --> 0:19:56.800
<v Speaker 3>they're out on the water. It's basically Jaws. The creature

0:19:56.840 --> 0:19:58.840
<v Speaker 3>looks like a cross between kind of like a sting

0:19:58.920 --> 0:20:01.320
<v Speaker 3>ray but also like a and kind of a giant

0:20:01.359 --> 0:20:06.200
<v Speaker 3>silver tuna type thing. The other Killer Manta movie that

0:20:06.240 --> 0:20:10.600
<v Speaker 3>you flagged for me is The Devil Monster, which was

0:20:10.680 --> 0:20:12.960
<v Speaker 3>released in several different years. There was a nineteen thirty

0:20:13.000 --> 0:20:15.919
<v Speaker 3>six version, nineteen forty six version, also known as The

0:20:16.040 --> 0:20:20.840
<v Speaker 3>Sea Fiend. This is yet another production at least somewhat

0:20:20.880 --> 0:20:24.800
<v Speaker 3>marketed as ray horror, but it actually features relatively little

0:20:24.840 --> 0:20:28.040
<v Speaker 3>on screen ray action. So it was first made in

0:20:28.119 --> 0:20:31.639
<v Speaker 3>nineteen thirty six re edited and re released multiple times,

0:20:31.640 --> 0:20:35.000
<v Speaker 3>including in nineteen forty six when it was beefed up

0:20:35.000 --> 0:20:38.159
<v Speaker 3>with a bunch of exploitation content, which included footage of

0:20:38.160 --> 0:20:41.920
<v Speaker 3>what appears to be sadly genuine animal cruelty, like forcing

0:20:41.960 --> 0:20:45.879
<v Speaker 3>live animals to fight each other, and then also stock

0:20:46.200 --> 0:20:50.280
<v Speaker 3>documentary footage of native Pacific islanders just going about their

0:20:50.359 --> 0:20:53.680
<v Speaker 3>daily life included, no doubt, because this was a way

0:20:53.800 --> 0:20:58.000
<v Speaker 3>around Hayes Code prohibitions on nudity at the time. This

0:20:58.160 --> 0:21:01.159
<v Speaker 3>was directed by s Edwin Graham. The basic plot of

0:21:01.200 --> 0:21:03.520
<v Speaker 3>the nineteen forty six version is about a mission to

0:21:03.560 --> 0:21:06.760
<v Speaker 3>find a missing sailor whose ship was wrecked on the Galapagos,

0:21:07.880 --> 0:21:10.520
<v Speaker 3>though apparently huge stretches of the movie take a break

0:21:10.520 --> 0:21:13.480
<v Speaker 3>from the main narrative to just show octopus fights or

0:21:13.640 --> 0:21:18.399
<v Speaker 3>top topless women processing grain, and the climax has several

0:21:18.480 --> 0:21:21.760
<v Speaker 3>characters forced to battle a giant manta ray that is

0:21:21.800 --> 0:21:24.440
<v Speaker 3>said to be a threat to the local tuna fishermen.

0:21:25.600 --> 0:21:29.080
<v Speaker 3>So once again you got a monster manter ray the monster.

0:21:29.320 --> 0:21:31.800
<v Speaker 3>So I looked at this part where they're battling the ray,

0:21:31.920 --> 0:21:36.040
<v Speaker 3>and it does look much more clearly like a ray. Unfortunately,

0:21:36.119 --> 0:21:38.320
<v Speaker 3>I think in this case that's because it is a

0:21:38.359 --> 0:21:41.280
<v Speaker 3>real manta ray and the film's action climax is just

0:21:41.359 --> 0:21:43.880
<v Speaker 3>an unsimulated harpooning of a real animal.

0:21:44.119 --> 0:21:46.159
<v Speaker 2>Oh well, that's quite unfortunate.

0:21:46.680 --> 0:21:48.959
<v Speaker 3>So from a distance, I'm going to give a preemptive

0:21:49.000 --> 0:21:51.080
<v Speaker 3>thumbs down to both of these movies.

0:21:51.640 --> 0:21:54.720
<v Speaker 2>Yeah, I don't think either of these are contenders for

0:21:54.800 --> 0:21:56.040
<v Speaker 2>weird house cinema treatment.

0:21:56.240 --> 0:22:00.480
<v Speaker 3>Yeah, but it does raise this question, like because it's

0:22:00.520 --> 0:22:04.680
<v Speaker 3>framing them, framing rays as this monster that attacks humans

0:22:04.680 --> 0:22:07.239
<v Speaker 3>and you know, threatens boats and all. This was it

0:22:07.359 --> 0:22:10.640
<v Speaker 3>common before the modern era to view manta rays as

0:22:10.680 --> 0:22:13.959
<v Speaker 3>a kind of monster or at least a potentially dangerous animal,

0:22:14.080 --> 0:22:18.320
<v Speaker 3>like its cousins, the predatory sharks. And yes, I did

0:22:18.320 --> 0:22:21.800
<v Speaker 3>find evidence that this was just kind of common sailor's

0:22:21.840 --> 0:22:24.680
<v Speaker 3>lore that rays would, you know, could be dangerous, could

0:22:24.680 --> 0:22:28.160
<v Speaker 3>attack you, They might attack boats, they might attack divers.

0:22:28.960 --> 0:22:32.119
<v Speaker 3>One article I came across that was recounting some of

0:22:32.119 --> 0:22:36.280
<v Speaker 3>this folklore was from nineteen ten by the American biologist

0:22:36.359 --> 0:22:39.760
<v Speaker 3>Theodore Gill. It's called the Story of the Devilfish. That

0:22:39.880 --> 0:22:42.920
<v Speaker 3>name can be a little confusing because the term devilfish

0:22:43.160 --> 0:22:46.560
<v Speaker 3>or devil ray is still used today to refer to

0:22:46.800 --> 0:22:50.639
<v Speaker 3>a number of species within the genus Mobula, and that

0:22:50.840 --> 0:22:53.560
<v Speaker 3>is the genus to which the manta rays belong. Basically,

0:22:53.560 --> 0:22:57.080
<v Speaker 3>manta rays are the largest couple of species within the

0:22:57.119 --> 0:23:00.280
<v Speaker 3>genus Mobula, and then some of the other species within

0:23:00.320 --> 0:23:04.520
<v Speaker 3>the genus mobular are often called like devil rays or devilfish.

0:23:04.680 --> 0:23:08.119
<v Speaker 3>But the term, I think also is still sometimes used

0:23:08.240 --> 0:23:11.600
<v Speaker 3>to refer to just the rays in this geno more generally,

0:23:11.840 --> 0:23:14.440
<v Speaker 3>so I know that's confusing. I think the lore Gil

0:23:14.640 --> 0:23:17.880
<v Speaker 3>is talking about in this article probably does not observe

0:23:18.040 --> 0:23:21.120
<v Speaker 3>distinctions between devil rays and manta rays as we would

0:23:21.119 --> 0:23:24.000
<v Speaker 3>sort them today. It's probably just sailors are looking at

0:23:24.000 --> 0:23:27.440
<v Speaker 3>this thing's basically manta ray shaped. These things probably look

0:23:27.560 --> 0:23:29.920
<v Speaker 3>mostly the same to sailors. That's got you know, it's

0:23:29.920 --> 0:23:31.919
<v Speaker 3>got the wings, and it's got something that looks like

0:23:31.960 --> 0:23:34.800
<v Speaker 3>horns in the front, and it's big. So that's one

0:23:34.800 --> 0:23:38.840
<v Speaker 3>of these devilfish or devil rays. Gil in the beginning

0:23:38.880 --> 0:23:42.560
<v Speaker 3>of this article attests to common associations made between what

0:23:42.600 --> 0:23:47.480
<v Speaker 3>he calls the great ray and devils, vampires, and bats,

0:23:47.680 --> 0:23:51.639
<v Speaker 3>and he mentions that common names include the sea bat

0:23:51.880 --> 0:23:56.360
<v Speaker 3>like in the movie. And then concerning these associations with bats,

0:23:57.160 --> 0:24:00.720
<v Speaker 3>he's quoting another author named Holder, and he writes, quote

0:24:00.840 --> 0:24:05.399
<v Speaker 3>Holder thought that quote no more diabolical creature could be imagined.

0:24:05.800 --> 0:24:09.600
<v Speaker 3>They resembled enormous bats, and in following one another around

0:24:09.640 --> 0:24:12.640
<v Speaker 3>the circle, raised the outer tip of the long winglike

0:24:12.760 --> 0:24:15.639
<v Speaker 3>fin high out of the water in a graceful curve,

0:24:15.920 --> 0:24:19.919
<v Speaker 3>the other being deeply submerged. But then gil goes on

0:24:19.960 --> 0:24:23.320
<v Speaker 3>to say, quote another name for the monster ray has

0:24:23.359 --> 0:24:26.560
<v Speaker 3>been borrowed from the Spanish. Among the fishermen and especially

0:24:26.640 --> 0:24:29.800
<v Speaker 3>the pearl divers of Central America and western Mexico, it

0:24:29.880 --> 0:24:32.720
<v Speaker 3>is known as the manta. This is a Spanish term

0:24:32.960 --> 0:24:36.439
<v Speaker 3>meaning originally blanket, and was given by the fishermen in

0:24:36.520 --> 0:24:39.520
<v Speaker 3>parts of Spain and the island of Mallorca to a

0:24:39.600 --> 0:24:44.080
<v Speaker 3>species of the Mediterranean, and extended thence to similar fishes

0:24:44.119 --> 0:24:46.800
<v Speaker 3>of other regions. It has been explained that the name

0:24:46.880 --> 0:24:49.520
<v Speaker 3>was given by the Spaniards of America to the devilfish

0:24:49.600 --> 0:24:53.639
<v Speaker 3>because it was alleged to hover over and cover a

0:24:53.680 --> 0:24:57.600
<v Speaker 3>fisherman at the bottom as a blanket preparatory to killing

0:24:57.680 --> 0:25:02.560
<v Speaker 3>him for good. Indeed, that the devilfish may so attack

0:25:02.600 --> 0:25:05.479
<v Speaker 3>a man is not only widely spread, but of an

0:25:05.520 --> 0:25:09.240
<v Speaker 3>ancient origin. Such an idea, however, is contrary to our

0:25:09.280 --> 0:25:13.680
<v Speaker 3>knowledge of the fish. Like several other of the gigantic selations,

0:25:13.920 --> 0:25:18.359
<v Speaker 3>its diet is in almost inverse ratio to its size.

0:25:18.440 --> 0:25:21.320
<v Speaker 3>So already in nineteen ten, Theodore Gill is not going

0:25:21.359 --> 0:25:24.320
<v Speaker 3>for the lore that the rays fold down like a

0:25:24.359 --> 0:25:26.840
<v Speaker 3>death blanket over the divers to cover them on the

0:25:26.840 --> 0:25:30.000
<v Speaker 3>bottom and prepare them for death. But I did want

0:25:30.040 --> 0:25:32.520
<v Speaker 3>to say I think he is sort of onto something

0:25:32.560 --> 0:25:36.040
<v Speaker 3>when commenting about the idea of the diet being in

0:25:36.119 --> 0:25:39.760
<v Speaker 3>almost inverse ratio to its size. This is not like

0:25:39.800 --> 0:25:42.399
<v Speaker 3>a hard and fast rule. And there are very big

0:25:42.480 --> 0:25:47.199
<v Speaker 3>active predators that prey on large animals, But many of

0:25:47.320 --> 0:25:50.720
<v Speaker 3>the largest animals in the ocean, and the largest species

0:25:50.760 --> 0:25:55.159
<v Speaker 3>within different marine lineages, are filter feeders, feeding entirely on

0:25:55.280 --> 0:25:58.439
<v Speaker 3>tiny organisms and small bits of organic matter. And this

0:25:58.520 --> 0:26:02.440
<v Speaker 3>is true, of course of the giant oceanic manterray. Now

0:26:02.520 --> 0:26:06.080
<v Speaker 3>why would that be if you have a big filter

0:26:06.160 --> 0:26:09.200
<v Speaker 3>feeding surface and basically like a big kind of bowl

0:26:09.200 --> 0:26:12.520
<v Speaker 3>shaped mouth that functions like a sieve, and a big

0:26:12.600 --> 0:26:15.399
<v Speaker 3>body that can store a lot of energy for time

0:26:15.520 --> 0:26:19.160
<v Speaker 3>in between feeding booms. It can be an awesomely efficient

0:26:19.200 --> 0:26:22.040
<v Speaker 3>way to live, and with a large body yourself, you

0:26:22.040 --> 0:26:24.520
<v Speaker 3>don't need to worry a whole lot about predators. From

0:26:24.560 --> 0:26:28.000
<v Speaker 3>what I've been reading, the only real predators of the

0:26:28.040 --> 0:26:31.600
<v Speaker 3>giant oceanic manta rays are humans of course, and maybe

0:26:31.640 --> 0:26:35.640
<v Speaker 3>some toothed whales like orcas, and I think sharks may

0:26:35.720 --> 0:26:38.320
<v Speaker 3>sometimes bite them as well, but I understand sharks are

0:26:38.320 --> 0:26:40.640
<v Speaker 3>not major predators for giant mantas.

0:26:41.080 --> 0:26:43.919
<v Speaker 2>Yeah, we'll come back to this, but basically that's the case,

0:26:44.080 --> 0:26:47.879
<v Speaker 2>but with some variations depending on exactly where in the

0:26:47.920 --> 0:26:52.679
<v Speaker 2>world you are, like the actually what the surrounding environment

0:26:52.960 --> 0:26:55.760
<v Speaker 2>is consisting of, and you know where the mantas are living.

0:26:55.960 --> 0:26:58.240
<v Speaker 3>Yeah, so in general that there are a lot of

0:26:58.359 --> 0:27:01.760
<v Speaker 3>upsides to being a big filter feeding organism. If you're big,

0:27:02.040 --> 0:27:04.600
<v Speaker 3>you don't have to worry much about predators. You don't

0:27:04.640 --> 0:27:07.560
<v Speaker 3>have to be all that like fast or dangerous or anything.

0:27:07.600 --> 0:27:09.399
<v Speaker 3>You just kind of have to like cruise around with

0:27:09.480 --> 0:27:13.000
<v Speaker 3>a big filter feeding surface scoop in a lot of stuff,

0:27:13.200 --> 0:27:15.399
<v Speaker 3>just take it all in and get huge amounts of

0:27:15.400 --> 0:27:18.680
<v Speaker 3>biomass going straight into your metabolism and then store a

0:27:18.720 --> 0:27:21.040
<v Speaker 3>lot of it for later. That's another thing that people

0:27:21.080 --> 0:27:23.600
<v Speaker 3>often don't think about about the advantages of having a

0:27:23.600 --> 0:27:26.920
<v Speaker 3>big body biologically. You know, you think, well, it's good

0:27:27.160 --> 0:27:28.800
<v Speaker 3>to be bigger if you're in a fight. I mean

0:27:28.840 --> 0:27:31.880
<v Speaker 3>sometimes that's true, yes, but it's also just like you've

0:27:31.880 --> 0:27:34.360
<v Speaker 3>got a big freezer. Basically you can store a lot

0:27:34.359 --> 0:27:35.640
<v Speaker 3>of energy in that body.

0:27:36.080 --> 0:27:37.719
<v Speaker 2>But of course a big part of this is in

0:27:37.800 --> 0:27:40.440
<v Speaker 2>doing this as an organism, you become a specialist.

0:27:40.960 --> 0:27:43.000
<v Speaker 3>Right. So if you're a giant mantray and you come

0:27:43.040 --> 0:27:46.360
<v Speaker 3>across some divers in the water, I mean those divers

0:27:46.440 --> 0:27:49.200
<v Speaker 3>might be delicious, full of nutrition, but you just there's

0:27:49.240 --> 0:27:51.320
<v Speaker 3>nothing much you can do with them, Like, you don't

0:27:51.359 --> 0:27:53.680
<v Speaker 3>even have the tools really to eat that diver if

0:27:53.680 --> 0:27:54.199
<v Speaker 3>you wanted to.

0:27:54.560 --> 0:27:57.720
<v Speaker 2>Yeah, that ship sailed long ago. Well, one can only

0:27:57.760 --> 0:28:00.720
<v Speaker 2>imagine that this is based on the fact that, of

0:28:00.760 --> 0:28:03.840
<v Speaker 2>course they're big, and it's natural for a human being

0:28:04.119 --> 0:28:06.639
<v Speaker 2>in the water outside of their element to be a

0:28:06.680 --> 0:28:10.360
<v Speaker 2>little spooked by large fish. I mean that's common, you kunter,

0:28:10.440 --> 0:28:13.560
<v Speaker 2>that's snorkeling. I feel, unless I know for certain what

0:28:13.600 --> 0:28:16.600
<v Speaker 2>I'm looking at, I would be a little nervous around

0:28:16.600 --> 0:28:19.280
<v Speaker 2>a large fish in the water. And then on top

0:28:19.320 --> 0:28:21.240
<v Speaker 2>of that, we have this we've already talked about how

0:28:21.680 --> 0:28:25.639
<v Speaker 2>there are observations of manta rays being curious concerning humans.

0:28:25.640 --> 0:28:28.439
<v Speaker 2>Manta rays more than devil rays, I'm to understand, but

0:28:28.640 --> 0:28:30.480
<v Speaker 2>that would of course add to it. If you're already

0:28:30.480 --> 0:28:32.320
<v Speaker 2>a little nervous around a big animal and it is

0:28:32.359 --> 0:28:36.080
<v Speaker 2>even halfway curious about you, that might also lead to

0:28:36.119 --> 0:28:37.080
<v Speaker 2>this kind of conclusion.

0:28:37.440 --> 0:28:40.640
<v Speaker 3>Right. And while manta rays are very well known for

0:28:40.760 --> 0:28:43.240
<v Speaker 3>not being aggressive towards humans, I mean, it would still

0:28:43.480 --> 0:28:46.120
<v Speaker 3>be totally possible for one to just like injure you

0:28:46.160 --> 0:28:48.160
<v Speaker 3>by accident if you're getting too close. I mean they're

0:28:48.160 --> 0:28:50.400
<v Speaker 3>big animals, you know, yeah, and roll over, so like

0:28:50.440 --> 0:28:52.320
<v Speaker 3>you just you know, keep your distance.

0:28:52.600 --> 0:28:54.840
<v Speaker 2>Yeah. And it's my understanding that as far as any

0:28:54.920 --> 0:28:59.840
<v Speaker 2>kind of like recorded accounts of even minor injuries concerning

0:29:00.120 --> 0:29:03.520
<v Speaker 2>manta rays and injuries to human beings, it's involved people

0:29:03.560 --> 0:29:05.840
<v Speaker 2>getting too close to them, trying to ride them, and

0:29:05.880 --> 0:29:07.920
<v Speaker 2>so forth, which you are not supposed to do.

0:29:08.000 --> 0:29:11.280
<v Speaker 3>So despite their reputation as diabolical, but you know, vampire

0:29:11.320 --> 0:29:13.400
<v Speaker 3>bats of the sea or as some kind of underwater

0:29:13.520 --> 0:29:17.640
<v Speaker 3>death blanket. No giant mante rays or mante rays generally

0:29:18.160 --> 0:29:21.000
<v Speaker 3>devil rays as well, are generally not to be thought

0:29:21.040 --> 0:29:24.080
<v Speaker 3>of as a threat to humans, generally not very aggressive

0:29:24.480 --> 0:29:27.680
<v Speaker 3>and not anything to be all that concerned about. But

0:29:28.080 --> 0:29:31.320
<v Speaker 3>there is one other thing I came across in Gill's

0:29:31.360 --> 0:29:34.880
<v Speaker 3>article that really does paint a kind of scary picture,

0:29:34.960 --> 0:29:39.000
<v Speaker 3>not because of the ray doing anything threatening, but just

0:29:39.000 --> 0:29:42.400
<v Speaker 3>because of the sonic atmosphere it creates. And this is

0:29:42.440 --> 0:29:45.160
<v Speaker 3>Gil describing the experience of what it's like to be

0:29:45.360 --> 0:29:48.520
<v Speaker 3>around one of these giant rays jumping out of the water,

0:29:48.560 --> 0:29:52.680
<v Speaker 3>which they often do. So Gil writes, quote, it is

0:29:52.720 --> 0:29:55.720
<v Speaker 3>the great leaps out of the water that are most striking,

0:29:55.840 --> 0:29:59.560
<v Speaker 3>especially during the stillness of the night. Holder, on such

0:29:59.560 --> 0:30:02.640
<v Speaker 3>an a case on the outer Florida reef, first encountered

0:30:02.640 --> 0:30:05.720
<v Speaker 3>the fish, and then, quoting Holder, he says, quote, there

0:30:05.760 --> 0:30:08.480
<v Speaker 3>came out of the darkness near at hand, a rushing,

0:30:08.600 --> 0:30:12.240
<v Speaker 3>swishing noise, then a clap as of thunder, which seemed

0:30:12.280 --> 0:30:15.239
<v Speaker 3>to go roaring and reverberating away over the reef like

0:30:15.280 --> 0:30:18.840
<v Speaker 3>the discharge of a cannon. Not hard to imagine how

0:30:18.840 --> 0:30:21.440
<v Speaker 3>that could engender a sense of fear about this animal.

0:30:22.360 --> 0:30:25.640
<v Speaker 2>Absolutely yeah. The authors of the Guide to Manta and

0:30:25.680 --> 0:30:28.840
<v Speaker 2>Devil Rays of the world, Steven said. All they mentioned

0:30:28.840 --> 0:30:31.200
<v Speaker 2>that if you're in the water when this happens, you

0:30:31.280 --> 0:30:36.120
<v Speaker 2>definitely feel it. So yeah, manta's and devils devil rays

0:30:36.160 --> 0:30:39.000
<v Speaker 2>all engage in leaping behavior like this, sometimes several meters

0:30:39.000 --> 0:30:42.120
<v Speaker 2>out of the water, and it's unknown exactly why they

0:30:42.120 --> 0:30:44.240
<v Speaker 2>do it, which I guess is similar to other fish

0:30:44.240 --> 0:30:45.960
<v Speaker 2>which we've talked about on the show in the past.

0:30:46.000 --> 0:30:50.960
<v Speaker 2>But the predominant theories involve either the dislodging of parasites,

0:30:51.400 --> 0:30:53.520
<v Speaker 2>and as we'll discuss and I think the next episode

0:30:53.520 --> 0:30:56.080
<v Speaker 2>we do on mantas, they geary a pretty large parasite load.

0:30:56.720 --> 0:31:00.760
<v Speaker 2>The other possibility is communication. The authors note that this

0:31:00.800 --> 0:31:03.280
<v Speaker 2>would mean there's much more to their social interaction than

0:31:03.400 --> 0:31:07.520
<v Speaker 2>is often thought. But the basic hypothesis here is that

0:31:07.800 --> 0:31:12.800
<v Speaker 2>these different mobilid species, especially the manta, they slap back

0:31:12.840 --> 0:31:15.640
<v Speaker 2>down on the surface of the water, and in doing

0:31:15.680 --> 0:31:18.440
<v Speaker 2>so they create a pressure wave this thunderclap that you

0:31:18.560 --> 0:31:22.720
<v Speaker 2>reference that could then be detected by other rays of

0:31:22.720 --> 0:31:26.640
<v Speaker 2>the same species miles away. Given that they're often observed

0:31:26.720 --> 0:31:30.120
<v Speaker 2>leaping before feeding, they could be alerting other mantas to

0:31:30.160 --> 0:31:31.360
<v Speaker 2>a feeding opportunity.

0:31:31.640 --> 0:31:34.360
<v Speaker 3>Oh interesting, Okay.

0:31:33.520 --> 0:31:35.720
<v Speaker 2>And why would they do that, because that's a lie.

0:31:35.720 --> 0:31:37.480
<v Speaker 2>Would you want to tell the other rays about all

0:31:37.480 --> 0:31:40.520
<v Speaker 2>this great food you just found, Well, the authors point out,

0:31:40.720 --> 0:31:45.000
<v Speaker 2>because food is plentiful, but the opportunity itself to feed

0:31:45.160 --> 0:31:48.440
<v Speaker 2>is fleeting, subject to the tides and so forth. So

0:31:48.480 --> 0:31:51.480
<v Speaker 2>the signal might be to bring in as many fellow

0:31:51.600 --> 0:31:55.680
<v Speaker 2>rays as possible, to engage in group feeding strategies, which

0:31:55.720 --> 0:31:58.680
<v Speaker 2>we'll get into in a bit here that also increase

0:31:58.880 --> 0:32:02.840
<v Speaker 2>individual food. So you know, let's all do it while

0:32:02.880 --> 0:32:07.520
<v Speaker 2>the getting's good. Let's all feed together and we'll all feast. Ah.

0:32:07.680 --> 0:32:08.720
<v Speaker 3>Interesting, Okay.

0:32:08.920 --> 0:32:11.480
<v Speaker 2>And then on top of that, some devil rays might

0:32:11.560 --> 0:32:14.920
<v Speaker 2>engage in breaching as a fitness signal for mating. But

0:32:14.960 --> 0:32:17.520
<v Speaker 2>again that's again that's a hypothesis based on just how

0:32:17.560 --> 0:32:20.320
<v Speaker 2>it seems to time with other things that they're doing

0:32:20.320 --> 0:32:23.280
<v Speaker 2>in the water. At any rate, as we giving back

0:32:23.320 --> 0:32:26.440
<v Speaker 2>to human sentiments about manta rays and the idea that

0:32:26.440 --> 0:32:30.320
<v Speaker 2>they're vampiric death blankets and so forth, Western sentiments seem

0:32:30.440 --> 0:32:33.200
<v Speaker 2>to turn in a major way during the nineteen seventies

0:32:33.280 --> 0:32:37.440
<v Speaker 2>despite the Jaws movies, with exposure to the reality that

0:32:37.520 --> 0:32:41.479
<v Speaker 2>manta rays are anything but the devilfish of a sailor's legend.

0:32:42.200 --> 0:32:44.280
<v Speaker 2>You know, they are the epitome of a gentle giant,

0:32:44.400 --> 0:32:48.560
<v Speaker 2>indifferent or even curious considering humans in the water, and

0:32:49.040 --> 0:32:52.120
<v Speaker 2>not aggressive at all. Again, I think the rare cases

0:32:52.160 --> 0:32:55.120
<v Speaker 2>you'll find of people being injured at all by a

0:32:55.160 --> 0:32:57.640
<v Speaker 2>manta are because they were intentionally trying to get way

0:32:57.640 --> 0:33:01.960
<v Speaker 2>too close to them as the harvesting of their gills goes.

0:33:02.720 --> 0:33:06.080
<v Speaker 2>Manta tourism has apparently been a major factor thus far

0:33:06.200 --> 0:33:09.320
<v Speaker 2>in the fight against this practice. People around the world

0:33:09.360 --> 0:33:11.800
<v Speaker 2>continue to spend a lot of money to observe manta

0:33:11.880 --> 0:33:14.880
<v Speaker 2>rays in the wild. In that twenty eighteen Guide to

0:33:14.920 --> 0:33:17.160
<v Speaker 2>the Man and Devil Rays of the World book, the

0:33:17.200 --> 0:33:19.840
<v Speaker 2>authors share that at the time of its publication, the

0:33:19.880 --> 0:33:23.960
<v Speaker 2>global estimate for direct revenue generated by manta tourism with

0:33:24.000 --> 0:33:28.480
<v Speaker 2>something like seventy three million annually, with associated tourism revenue

0:33:28.520 --> 0:33:31.520
<v Speaker 2>pushing that up to like one hundred and forty million annually.

0:33:32.920 --> 0:33:37.280
<v Speaker 2>So all of that basically translates to the realization that

0:33:38.360 --> 0:33:41.320
<v Speaker 2>if manta tourism is in the mix, a live manta

0:33:41.400 --> 0:33:44.480
<v Speaker 2>ray is worth far more than a dead one, and

0:33:44.560 --> 0:33:47.240
<v Speaker 2>so manti tourism, like a lot of marine tourism plays

0:33:47.280 --> 0:33:51.040
<v Speaker 2>an important role in manta conservation. At the same time,

0:33:51.080 --> 0:33:53.840
<v Speaker 2>of course, there's a careful balance there, right, because you

0:33:53.880 --> 0:33:56.280
<v Speaker 2>want people to be excited about the mantas. You want

0:33:56.320 --> 0:33:58.040
<v Speaker 2>people to come out and see the manta, spend money

0:33:58.040 --> 0:34:01.200
<v Speaker 2>on the mantas and thus helping to protect them. But

0:34:01.440 --> 0:34:05.200
<v Speaker 2>also you want to avoid detrimental side effects. You know

0:34:05.600 --> 0:34:07.440
<v Speaker 2>that can occur in a number of forms. You don't

0:34:07.480 --> 0:34:11.440
<v Speaker 2>want divers and snorkelers getting way too close to the animals.

0:34:12.000 --> 0:34:15.400
<v Speaker 2>You also don't want unsustainable practices at resorts and on

0:34:15.560 --> 0:34:18.560
<v Speaker 2>liver boards and so forth. You know, the ships are

0:34:18.560 --> 0:34:21.480
<v Speaker 2>going to take divers and snorkelers out to see these creatures.

0:34:22.640 --> 0:34:24.799
<v Speaker 2>You know, you have to walk that line, and I

0:34:24.800 --> 0:34:28.840
<v Speaker 2>think in my understanding is that everyone involved continues to

0:34:28.960 --> 0:34:42.280
<v Speaker 2>figure out exactly where that line falls. So at this point,

0:34:42.320 --> 0:34:46.120
<v Speaker 2>I thought we'd run through some basics about manta rays

0:34:46.160 --> 0:34:50.680
<v Speaker 2>and some associated devil rays to finish out this episode.

0:34:51.200 --> 0:34:53.719
<v Speaker 2>So mantis and devil rays belong to a group collectively

0:34:53.760 --> 0:34:59.160
<v Speaker 2>known as the Mobulids of the family mobili day zooming

0:34:59.160 --> 0:35:04.360
<v Speaker 2>out there rays of the order milio Batiforms, which contains

0:35:04.520 --> 0:35:07.800
<v Speaker 2>twelve families, three hundred and seventy species of rays, including

0:35:07.840 --> 0:35:12.040
<v Speaker 2>sting rays of various species. Moboloids are most closely related

0:35:12.040 --> 0:35:15.080
<v Speaker 2>to eagle rays and clown nose rays of this order,

0:35:15.560 --> 0:35:19.000
<v Speaker 2>which are bottom feeders. They sift for mollusks and crustaceans

0:35:19.040 --> 0:35:23.680
<v Speaker 2>on the seabed. Moboloids, however, have adapted to pelagic filter

0:35:23.760 --> 0:35:27.520
<v Speaker 2>feeding in the open water, similar to the evolutionary path

0:35:27.640 --> 0:35:31.000
<v Speaker 2>we see with like baleen whales and whale sharks, you know,

0:35:31.040 --> 0:35:34.239
<v Speaker 2>as we've been discussing, like specialize in feeding on all

0:35:34.360 --> 0:35:37.239
<v Speaker 2>the little things in the water. Eat the cloud if

0:35:37.280 --> 0:35:40.600
<v Speaker 2>you will, Yes, So they use their mouths and modified

0:35:40.680 --> 0:35:44.759
<v Speaker 2>gill plates in their filter feeding. The devil ray that

0:35:44.760 --> 0:35:47.080
<v Speaker 2>we've been discussing, these are much smaller. There are a

0:35:47.080 --> 0:35:50.120
<v Speaker 2>few different varieties, with the largest I believe being the

0:35:50.239 --> 0:35:53.560
<v Speaker 2>Chilean devil ray or sickle fin devil ray. It has

0:35:53.560 --> 0:35:56.520
<v Speaker 2>a maximum disc width of eleven point two feet or

0:35:56.520 --> 0:35:58.960
<v Speaker 2>three hundred and forty centimeters, and it can weigh up

0:35:58.960 --> 0:36:01.680
<v Speaker 2>to eight hundred and eighty two or four hundred kilograms.

0:36:03.000 --> 0:36:06.839
<v Speaker 2>The spinetail devil ray is also rather big. I mention

0:36:06.920 --> 0:36:10.800
<v Speaker 2>it because its scientific name is mobula mobular, which is

0:36:10.840 --> 0:36:16.120
<v Speaker 2>always fun. And again the reef manta ray Mobula alfredi,

0:36:16.239 --> 0:36:19.200
<v Speaker 2>which sounds delicious but it's not on the menu, comes

0:36:19.200 --> 0:36:21.840
<v Speaker 2>in at a maximum disc width of fifteen feet or

0:36:21.880 --> 0:36:24.840
<v Speaker 2>four hundred and fifty centimeters and a weight of fifteen

0:36:24.880 --> 0:36:28.200
<v Speaker 2>hundred pounds or seven hundred kilograms. But then again, the

0:36:28.239 --> 0:36:33.120
<v Speaker 2>oceanic manta is the biggest. That's Mobula birostras, and it

0:36:33.160 --> 0:36:36.040
<v Speaker 2>can reach a disc width of twenty three feet or

0:36:36.080 --> 0:36:38.760
<v Speaker 2>seven hundred centimeters and a weight of up to forty

0:36:38.760 --> 0:36:41.600
<v Speaker 2>four hundred pounds or two thousand kilograms. They are the

0:36:41.680 --> 0:36:44.359
<v Speaker 2>largest of all rays, and actually, i'm to understand, the

0:36:44.440 --> 0:36:48.000
<v Speaker 2>fifth largest fish. Period. There's also some argument to be

0:36:48.080 --> 0:36:51.680
<v Speaker 2>made for a possible third species of extent manta, a

0:36:52.320 --> 0:36:57.560
<v Speaker 2>Caribbean manta, closely related to the oceanic manta, only smaller now.

0:36:57.560 --> 0:37:00.879
<v Speaker 2>In addition to those gill plates, the other defining characteristics

0:37:00.880 --> 0:37:05.960
<v Speaker 2>of the mamboloids are their devil horns. That certainly seems

0:37:05.960 --> 0:37:08.080
<v Speaker 2>to lend to this idea that there's some sort of evil,

0:37:08.160 --> 0:37:10.560
<v Speaker 2>vampiric creature there. They're like bats, and then they have

0:37:10.640 --> 0:37:13.319
<v Speaker 2>devil horns. These are not horns, of course, These are

0:37:13.760 --> 0:37:19.000
<v Speaker 2>modified cephalic fins, So the rays use these special fins

0:37:19.000 --> 0:37:22.640
<v Speaker 2>to funnel plankton into their mouths during feeding. So the

0:37:22.640 --> 0:37:25.680
<v Speaker 2>gill plates that we were describing, these are supported by

0:37:25.680 --> 0:37:28.719
<v Speaker 2>five pairs of gill arches. You can see these when

0:37:28.760 --> 0:37:33.160
<v Speaker 2>you see some like wide mouth photographs of these various organisms,

0:37:33.760 --> 0:37:37.239
<v Speaker 2>and each species both slightly different gill plate structures to

0:37:37.239 --> 0:37:40.920
<v Speaker 2>capture particular target prey. We were talking about the ratio

0:37:41.040 --> 0:37:43.239
<v Speaker 2>between the size of the organism and the size of

0:37:43.239 --> 0:37:47.960
<v Speaker 2>the prey. Manta rays, the biggest, have gill plates evolved

0:37:47.960 --> 0:37:52.000
<v Speaker 2>to capture much smaller plectonic prey compared to various devil

0:37:52.080 --> 0:37:55.200
<v Speaker 2>ray species for example, they're going after the real small

0:37:55.200 --> 0:37:58.520
<v Speaker 2>stuff they're feeding. Is really interesting though, on top of this,

0:37:58.560 --> 0:38:00.600
<v Speaker 2>because their bodies are you know, think of them as

0:38:00.600 --> 0:38:02.879
<v Speaker 2>being largely flat, you know, they're kind of flattened out,

0:38:03.680 --> 0:38:07.720
<v Speaker 2>But as Stevens and co authors point out, during feeding quote,

0:38:07.760 --> 0:38:11.680
<v Speaker 2>their once flattened body and mouth becomes a giant black

0:38:11.719 --> 0:38:15.240
<v Speaker 2>hole with the pectoral fins serving as wings that power

0:38:15.360 --> 0:38:18.080
<v Speaker 2>the ray through the water, and then the gill plates

0:38:18.080 --> 0:38:21.000
<v Speaker 2>do the rest. So yeah, they expand out. They become

0:38:21.040 --> 0:38:25.160
<v Speaker 2>this like giant gaping maw to just consume all the

0:38:25.200 --> 0:38:28.080
<v Speaker 2>plankton they can get, and so that's the basic strategy.

0:38:28.160 --> 0:38:31.400
<v Speaker 2>Open your mouth really wide, use your cephalic fins to

0:38:31.440 --> 0:38:34.719
<v Speaker 2>help guide the food into the mouth, and then you know,

0:38:34.800 --> 0:38:37.080
<v Speaker 2>go in a straight line, just go straight through the food.

0:38:37.960 --> 0:38:41.799
<v Speaker 2>You know, eat the cloud. But that's just one of

0:38:42.160 --> 0:38:46.040
<v Speaker 2>eight and possibly nine different observed feeding strategies that you

0:38:46.120 --> 0:38:49.600
<v Speaker 2>see in rays, with only half of those being used

0:38:49.960 --> 0:38:53.080
<v Speaker 2>at least observed in devil rays. So I'm going to

0:38:53.200 --> 0:38:55.440
<v Speaker 2>roll through these because they're they're pretty interesting. Some some

0:38:55.560 --> 0:38:58.239
<v Speaker 2>are only slight variations based on the other ones. But

0:38:58.920 --> 0:39:01.239
<v Speaker 2>so first of all, you have straight feeding. So this

0:39:01.320 --> 0:39:05.480
<v Speaker 2>is usually horizontal, but sometimes it's vertical and the distance

0:39:05.520 --> 0:39:08.600
<v Speaker 2>depends on prey frequency. So you have a cloud of plankton,

0:39:08.640 --> 0:39:11.080
<v Speaker 2>a big school of plankedin or something. Well, you just

0:39:11.239 --> 0:39:13.920
<v Speaker 2>move straight through it, eat it, eat it up, swallow

0:39:13.960 --> 0:39:15.400
<v Speaker 2>it up, and then you do a one hundred and

0:39:15.440 --> 0:39:17.960
<v Speaker 2>eighty degree turn at the end and repeat as needed.

0:39:18.480 --> 0:39:22.320
<v Speaker 2>Number two this is manta's only apparently, and it's surface feeding.

0:39:22.400 --> 0:39:25.960
<v Speaker 2>So this is basically straight feeding, except right at the

0:39:25.960 --> 0:39:28.319
<v Speaker 2>surface of the water. All right, All right, now it

0:39:28.360 --> 0:39:32.440
<v Speaker 2>starts getting interesting. Chain feeding. So up to several dozen

0:39:32.520 --> 0:39:35.040
<v Speaker 2>individuals proceeding in a line feeding.

0:39:35.640 --> 0:39:38.839
<v Speaker 3>Oh, it's funny that that would actually work. I would

0:39:38.880 --> 0:39:40.879
<v Speaker 3>imagine the further back you are in the line, maybe

0:39:40.880 --> 0:39:43.879
<v Speaker 3>you're not getting anything. But no, I wonder if going

0:39:43.920 --> 0:39:46.200
<v Speaker 3>through a head kind of creates a vortex, maybe that

0:39:46.320 --> 0:39:47.560
<v Speaker 3>sucks some more things in.

0:39:48.160 --> 0:39:50.600
<v Speaker 2>I think that that might be what's happening. And also

0:39:50.640 --> 0:39:53.040
<v Speaker 2>we just have to remember we're dealing with an abundance

0:39:53.120 --> 0:39:56.760
<v Speaker 2>of food here and this ties in. This is exactly

0:39:56.800 --> 0:39:59.280
<v Speaker 2>and this is an example of the social feeding technique

0:39:59.480 --> 0:40:05.399
<v Speaker 2>group feed technique that they might hypothetically be calling other

0:40:05.480 --> 0:40:10.000
<v Speaker 2>mantas to engage in. Okay of next piggyback feeding. So

0:40:10.120 --> 0:40:13.040
<v Speaker 2>this is manta's only and it's actually only been observed

0:40:13.040 --> 0:40:15.959
<v Speaker 2>in reef mantas. So you'll have a smaller manta, usually

0:40:16.000 --> 0:40:20.480
<v Speaker 2>a male, and it finds a larger usually female, matches

0:40:20.520 --> 0:40:22.920
<v Speaker 2>her pace, and it's like stacked on top of her

0:40:23.360 --> 0:40:26.120
<v Speaker 2>and feeds as she's feeding in a straight line. And

0:40:26.200 --> 0:40:28.880
<v Speaker 2>sometimes you'll get additional mantas stacked on top of that

0:40:29.239 --> 0:40:32.640
<v Speaker 2>until the bottom most manta swims off and displaces the

0:40:32.640 --> 0:40:35.600
<v Speaker 2>whole stack. All right, Here's where it gets a little fancy.

0:40:35.719 --> 0:40:38.000
<v Speaker 2>Summer salt feeding. So this is where they're going in

0:40:38.000 --> 0:40:40.480
<v Speaker 2>a straight line, and then they'll do a three hundred

0:40:40.480 --> 0:40:43.520
<v Speaker 2>and sixty degree loop in the water while feeding, usually

0:40:43.560 --> 0:40:45.920
<v Speaker 2>just one or two loops out of straight feeding, but

0:40:45.960 --> 0:40:50.719
<v Speaker 2>they might do several dozen continuous summer salts, depending I

0:40:50.800 --> 0:40:53.360
<v Speaker 2>guess on how it's going for them and with the plankton.

0:40:53.880 --> 0:40:55.640
<v Speaker 2>This next one, though, this is where it gets. This

0:40:55.920 --> 0:40:59.560
<v Speaker 2>one gets crazy cyclone feeding. What Yeah, so this is

0:40:59.600 --> 0:41:02.040
<v Speaker 2>a parent reef mantas only at least as far as

0:41:02.080 --> 0:41:05.200
<v Speaker 2>observations go. And it begins as just a line of

0:41:05.280 --> 0:41:11.040
<v Speaker 2>chain feeding straight feeders. But then you know, something, something changes.

0:41:11.560 --> 0:41:14.800
<v Speaker 2>You know, maybe it's in just the how much planked

0:41:14.840 --> 0:41:18.200
<v Speaker 2>in their encountering. But the chain loops back on itself

0:41:18.239 --> 0:41:20.680
<v Speaker 2>to form a circle, and now we have a circle

0:41:20.719 --> 0:41:24.760
<v Speaker 2>of mantas feeding. And then more mantas begin to form

0:41:25.080 --> 0:41:28.359
<v Speaker 2>to join in and become part of the formation, and

0:41:28.440 --> 0:41:31.960
<v Speaker 2>so we end up with a counterclockwise cyclone that might

0:41:32.080 --> 0:41:35.640
<v Speaker 2>ultimately entail one hundred and fifty individuals and it might

0:41:35.680 --> 0:41:36.960
<v Speaker 2>even last up to an hour.

0:41:37.400 --> 0:41:37.920
<v Speaker 3>Wow.

0:41:38.200 --> 0:41:40.960
<v Speaker 2>And again the idea here seems to be that these

0:41:42.120 --> 0:41:45.279
<v Speaker 2>these group feeding scenarios when they're they're able to pull

0:41:45.280 --> 0:41:49.000
<v Speaker 2>them together like it actually results in a bounty for

0:41:49.040 --> 0:41:53.040
<v Speaker 2>everyone involved. On top of this, we have sideways feeding.

0:41:53.200 --> 0:41:55.439
<v Speaker 2>This is maybe not that fancy, it's just the manta

0:41:55.560 --> 0:41:59.200
<v Speaker 2>ray doing you know, chain feeding or straight feeding. But

0:41:59.400 --> 0:42:02.320
<v Speaker 2>on their side. Then we have bottom feeding, which I

0:42:02.360 --> 0:42:04.000
<v Speaker 2>guess you can think of as a return to form

0:42:04.120 --> 0:42:06.800
<v Speaker 2>feeding along the bottom like some of the other rays

0:42:06.840 --> 0:42:10.560
<v Speaker 2>that they're more distantly related to. And then a ninth

0:42:10.840 --> 0:42:15.840
<v Speaker 2>possible feeding technique that the authors here observe in devil

0:42:15.920 --> 0:42:19.160
<v Speaker 2>rays is what they call lunge feeding, and that's rapid

0:42:19.280 --> 0:42:23.160
<v Speaker 2>feeding acceleration into dense schools of prey. Again, this would

0:42:23.160 --> 0:42:25.759
<v Speaker 2>I think only be devil rays, which are going to

0:42:25.840 --> 0:42:30.440
<v Speaker 2>be the smaller of the species involved here. So mangoloods

0:42:30.520 --> 0:42:33.239
<v Speaker 2>first pop up in the fossil records some twenty eight

0:42:33.239 --> 0:42:37.880
<v Speaker 2>million years ago during the Middle Oligocene epoch, so according

0:42:37.920 --> 0:42:41.399
<v Speaker 2>to Stevens at All, they're among the most recently evolved

0:42:41.840 --> 0:42:46.560
<v Speaker 2>of the elasmo Bronx. This includes all sharks and battomorphs,

0:42:46.719 --> 0:42:49.080
<v Speaker 2>so you know sharks, rays, and so forth, the various

0:42:49.480 --> 0:42:55.560
<v Speaker 2>cartilage fish swimmers of the oceans. They've evolved to of

0:42:55.560 --> 0:42:59.320
<v Speaker 2>course become exceptional open water swimmers with sufficient speed bursts

0:42:59.400 --> 0:43:01.440
<v Speaker 2>up to a belief twenty miles per hour or thirty

0:43:01.440 --> 0:43:06.080
<v Speaker 2>three kilometers per hour. And this was interesting, And I

0:43:06.120 --> 0:43:10.960
<v Speaker 2>have trouble exactly understanding this how this works, but I

0:43:11.000 --> 0:43:14.200
<v Speaker 2>totally believe it. They say that they're flattened shapes apparently

0:43:14.239 --> 0:43:17.920
<v Speaker 2>make it more difficult for predators to bite onto them,

0:43:18.000 --> 0:43:21.520
<v Speaker 2>hold onto them, or certainly to target vital areas that way.

0:43:22.360 --> 0:43:24.680
<v Speaker 3>Okay, Yeah, I wonder how that would work, because I

0:43:24.680 --> 0:43:27.440
<v Speaker 3>would imagine, you know, if you're kind of cookie shaped,

0:43:27.440 --> 0:43:29.400
<v Speaker 3>if you're flat, it might not be that hard to

0:43:29.440 --> 0:43:32.359
<v Speaker 3>take a bite of you. But I wonder if doing that,

0:43:32.480 --> 0:43:35.480
<v Speaker 3>you're maybe able to keep your most vital parts kind

0:43:35.520 --> 0:43:38.280
<v Speaker 3>of central, so if something does bite you, it gets

0:43:38.280 --> 0:43:39.560
<v Speaker 3>a less vital part of you.

0:43:40.480 --> 0:43:43.400
<v Speaker 2>Yeah, like maybe you're more it's more possible that you

0:43:43.480 --> 0:43:46.960
<v Speaker 2>get a bite of a fin or wing, if you will. Yeah,

0:43:47.920 --> 0:43:50.520
<v Speaker 2>this is something they get get into in the book.

0:43:50.960 --> 0:43:56.200
<v Speaker 2>They do rapidly heal from serious injuries. The book displays

0:43:56.880 --> 0:44:00.800
<v Speaker 2>a few different rather dramatic examples via photograph of rays

0:44:01.080 --> 0:44:04.040
<v Speaker 2>with clear bites taken out of their fins, out of

0:44:04.040 --> 0:44:08.600
<v Speaker 2>their wings, and then a subsequent photo showing how those

0:44:09.040 --> 0:44:14.240
<v Speaker 2>like massive bites have mostly but you know, imperfectly healed

0:44:14.560 --> 0:44:17.960
<v Speaker 2>at a later observation date. And I mentioned this already,

0:44:18.000 --> 0:44:21.320
<v Speaker 2>but predation rates also seem to depend on particular communities

0:44:21.320 --> 0:44:24.080
<v Speaker 2>and environments. So, for example, the authors of this book

0:44:24.080 --> 0:44:27.560
<v Speaker 2>point out that mantis and Mozambique display far more evidence

0:44:27.560 --> 0:44:30.479
<v Speaker 2>of shark attacks compared to those in the Maldives, where

0:44:30.600 --> 0:44:33.480
<v Speaker 2>less than fifteen percent of mantis show evidence of bites.

0:44:33.920 --> 0:44:36.719
<v Speaker 3>Yeah, I think I was specifically reading about off the

0:44:36.760 --> 0:44:39.960
<v Speaker 3>coast of Mozambique, where there was common evidence that mants

0:44:40.000 --> 0:44:42.680
<v Speaker 3>had been bitten by sharks but had survived the encounter

0:44:42.800 --> 0:44:44.800
<v Speaker 3>because they grew up and the wounds healed.

0:44:45.040 --> 0:44:48.960
<v Speaker 2>Yeah, and the healing of those wounds also involves some

0:44:49.040 --> 0:44:52.000
<v Speaker 2>of the cleaning fish, which we'll get back to in

0:44:52.040 --> 0:44:55.239
<v Speaker 2>the next episode we do on mantas. All right, well,

0:44:55.239 --> 0:44:57.640
<v Speaker 2>we're going to go and close this episode of stuff

0:44:57.640 --> 0:44:59.040
<v Speaker 2>to blow your mind, but we're going to be back.

0:44:59.040 --> 0:45:00.319
<v Speaker 2>I don't think it's going to be the this week.

0:45:00.360 --> 0:45:01.840
<v Speaker 2>I think that's going to be next week based on

0:45:01.880 --> 0:45:04.919
<v Speaker 2>the way the schedule's coming together. But we'll be back

0:45:05.239 --> 0:45:08.640
<v Speaker 2>with at least one more episode on the manta Ray.

0:45:08.760 --> 0:45:10.960
<v Speaker 2>If not a couple, we'll just see how it comes together.

0:45:11.440 --> 0:45:13.600
<v Speaker 2>Just a reminder for everyone out there, The Stuff to

0:45:13.600 --> 0:45:16.279
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0:45:16.320 --> 0:45:19.600
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0:45:54.040 --> 0:45:55.560
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0:45:55.560 --> 0:45:58.040
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0:45:58.040 --> 0:45:59.959
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0:46:00.200 --> 0:46:02.920
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