Stuff You Should Know - How Coelacanths Work

Episode Date: June 6, 2017

Coelacanths are incredibly interesting as far as fish go. For one, they were thought to have gone the way of the dinosaur, along with the dinosaur. They also give birth to live fish and tend to dwell more than 800 feet below the ocean's surface. And this is just the tip of the iceberg. Learn all about these fascinating creatures in today's episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

On the podcast, Hey Dude, the 90s called, David Lasher and Christine Taylor, stars of the cult classic show, Hey Dude, bring you back to the days of slip dresses and choker necklaces. We're gonna use Hey Dude as our jumping off point, but we are going to unpack and dive back into the decade of the 90s.

We lived it, and now we're calling on all of our friends to come back and relive it. Listen to Hey Dude, the 90s called on the iHeart radio app, Apple Podcasts, or wherever you get your podcasts. Hey, I'm Lance Bass, host of the new iHeart podcast, Frosted Tips with Lance Bass. Do you ever think to yourself, what advice would Lance Bass

and my favorite boy bands give me in this situation? If you do, you've come to the right place because I'm here to help. And a different hot, sexy teen crush boy bander each week to guide you through life. Tell everybody, ya everybody, about my new podcast and make sure to listen so we'll never, ever have to say. Bye, bye, bye.

Listen to Frosted Tips with Lance Bass on the iHeart radio app, Apple Podcasts, or wherever you listen to podcasts. Welcome to Stuff You Should Know, from HouseStuffWorks.com. Hey, and welcome to the podcast. I'm Josh Clark with Charles W. Chuck Bryant, Jerry Jerome Rowland.

And just the whole, the whole House Stuff Works gang. Here to present to you Stuff You Should Know. All three of us. How you doing? I'm good. Yeah? Yeah. I'm a little caffeinated, I should warn you.

Oh. A little bit, like when teeth are about to just come right out of my face. That's not good. You know, we did a video about Cilla Cantz one time. Yeah, like was it this day in history about when they were discovered? Yeah.

I ran across it. Cause it smacked as familiar to me and you know the constant fear we have of recording an entire podcast over is sort of always there. Yeah, the fear that sometimes comes true. Yeah. So I definitely went back and looked

and I was like, I knew we did something. Yeah, we were trapped in a shipping container, right? I didn't watch it. I didn't either. I just saw enough to say, oh yeah, I remember that. Yeah. That really weird, weird thing we did. But this is really cool, I think.

I do too. Cilla Cantz were, well, they're interesting. Despite what the HowStuffWorks article would lead you to believe. Oh, it was, yeah, it was a little thin wasn't it? A little bit. It was all right. Okay.

But luckily the rest of the internet is there for us. Right. Thanks Cilla, especially to Smithsonian and Mental Floss for this one, right? Yeah, that Mental Floss article is kind of neat actually. It was. So you want to go back to the beginning, actually the second beginning maybe?

No. Well, I don't know what you're talking about now, so just go ahead. Okay, well, follow me. We'll go back to the very beginning. We'll go back to something about 400 million years ago. Okay. During the Devonian period, which is AKA the rise of the fish.

Yes. The age of the fish, right? And in this Devonian period, there's a lot, a lot of stuff going on. Things have been swimming around for a while on Earth. There's a nice atmosphere that's developed. The things in the ocean are starting to say, oh, what's out there?

I want to see what's on land. Yeah, I can just crawl out and see. Yeah. I want to taste clover. So they start trying and during this period, there was the progression from the sea to the land. Yeah. And one of those things that was starting to develop legs

to get on the land was called the Cilla Canth. Yeah, which A, it means hollow spine, which we'll get to. There's a reason for that. Right. And B, it's spelled C-O-E-L-A-C-A-N-T-H, which is not how you would think it might be spelled. No. Or pronounced, brother.

Right. Either one. But it's Cilla Canth. It is Cilla Canth. And what it is is a fish that is, like you said, been around for a long, long time. It's kind of funny looking. And we'll get into all the physical characteristics

that make it unusual in a sec. But it is notable mainly for the fact that everyone thought it was gone forever. Right. Until it was suddenly discovered, this thing that swam with the dinosaurs was discovered anew in the 1930s. Right.

And then again a little bit later on. Yeah, because it pops up for the first time around 407 million years ago, I think I said. And then it just drops off 80 million years ago. So they said, well, a lot of stuff went the way of the dinosaur. Around the time the dinosaurs went away. Hey, no.

So that's probably what happened to the Cilla Canth. So it was quite a big surprise in the 1930s when a trawler that was out fishing, a trawler called the Nereen, which is captained by Hendrick Goosen off the coast of South Africa, came in and as was Captain Goosen's want, he contacted the director of the local museum

in East London, woman named Miss Marjorie Courtney Latimer. And she used to come over and look at the fish loads this guy would bring in because they were buddies. Yeah. And he gave her a call like normal and said, I got a load, you wanna come look at it? And she was like, it's two days before Christmas

and is blazing hot out. Don't forget we're in South Africa at the time. And she's like, I don't feel like it, but the world was saved. The world of ick theology was saved this day because this lady, Marjorie Courtney Latimer, was so nice that she decided to go look at the fish anyway, just to wish the captain and his crew a merry Christmas.

So she takes a look at this fish and here is her quote. As she recounted, that wasn't her quote at the time, her quote at the time, it's probably a South African expletive. But she said later, I picked away the layers of slime to reveal the most beautiful fish I had ever seen. And of course only a fish lover can find this thing truly beautiful.

Yeah. Because it's kind of ugly. It is. It was five feet long, a pale, a mauvey blue with faint flecks of white spots. It had an iridescent silver, blue, green sheen all over. It was covered in hard scales and it had four limb-like fins

and a strange little puppy dog tail. Not literally, of course. It was said, which would be great though, actually. Yeah, that's the dogfish that has that. It was such a beautiful fish, more like a big China ornament, but I didn't know what it was. And it was pretty faithful that she was called in

to look at this thing because it ended up being one of the most important zoological finds of history, probably. Of the 20th century, at least, for sure. Yeah, this woman's curiosity, something in her said, this is weird. This is unusual. This is something worth looking into.

So she took it with her. This thing was like five feet long, just under two meters, about a hundred and how many pounds? 127 pounds. This is a significant fish. And Ms. Courtney Latimer talked her way into a cab with it. She took a cab back to the East London Museum with this fish stuffed in the back seat.

And she took it to the taxidermist and had it stuffed. Unfortunately, the taxidermist wasn't completely aware of how to preserve a fish for identification and threw out the skeleton and the gills, which are what you need to ID a fish, apparently. Well, she probably should have said something. Well, she... Like this is no ordinary mount.

Yeah, right, she probably should have. Or maybe she did and he just ignored her. He's like, I'm not gonna get bossed around by women's 1938. So she contacts a guy named J.L.B. Smith who is an ictheologist. He's the head of the ictheology department at a university in Gramstown and a PhD in chemistry. He's a smart guy and he's the local fish expert

as far as she knows. Yeah, and they're pals. And so she said, hey, I've got this weird looking fish. And then Smith, his quote was, I told myself sternly not to be a fool, but there was something about that sketch. And apparently it was sketched. She sent him a sketch of the fish to begin with.

Yeah. That seized upon my imagination and told me that this was something very far beyond the usual run of fishes in our seas. And luckily, even though the fish was, I guess, mounted in a traditional form, which like you said, takes away its, how you can identify it,

she was able to preserve some of the scales. And somehow from these scales, he was able to say, this is a colicanth, sealicanth. Right. Well, that's what he said at first and she went, is pronounced sealicanth. He's like, oh, apparently he said, when he saw that scale and identified it positively as a sealicanth, his quote was,

if I'd met a dinosaur in the street, I wouldn't have been more astonished. I like that guy. A little hyperbole there, but I like it. So he, I mean, this is seriously, this is like the zoological find of the century and would be for the next 60 something years, right? So he very magnanimously says, you know what?

I am going to name this thing after you. And he named it as a new species, Latimeria chalamne, because, well, obviously her name was Courtney Latimer. Yeah. Courtney hyphen Latimer. Yes. And it was found in the Chalamne River at the mouth of it,

where it hits the coast off of the eastern coast of South Africa. So that's a great name. It's, it's perfect. Yeah. It really puts it in a place in time. So they have now discovered this thing. They realized that they have a big find on their hands.

They thought this thing had long been extinct by tens of millions of years. And so they started to research and, you know, try and learn more about this fish. Yeah. Which is no ordinary fish. No, but I mean, this was, so this was 1938, right? Yeah.

It was the only one that had been found for another 60 years. Yeah. I mean, there's only so much you can find from a stuffed fish, but it did prove because it had been caught alive. It wasn't like they pulled up a fossil or a dead fish. It had been alive when it was caught.

Yeah. I think it was attached to another fish. Oh, really? Like potentially trying to eat it. Oh, okay. Which is one of the, well, not unusual, but interesting things about the sealocanthus that eats meat. Well, there's a lot of unusual things about the sealocanthus.

Yeah. So fast forward to another 60 years, exactly, in Indonesia, which is on the other side of the Indian Ocean, the eastern side of the Indian Ocean. It was actually first seen in 1997 by a biologist named Mark Erdman, who was in Indonesia doing his PhD dissertation. And he saw a sealocanth in the market.

That's crazy. That's a sealocanth. What's that doing here? So apparently he put a bit of a bounty out on it with the locals. And within a year, by 1998, they had brought him a freshly caught one. Yeah, which is quite a task.

Yeah. It's a finding of once thought extinct fish. Yeah. It's a big one. Well, and we'll get to a little bit why it's even tougher than you would think too. Sure. So the one that Erdman found was brown, right?

Yeah, it was a little bit different color. Right. The one like Courtney Latimer described, those are known to be like steel blue. This is brown a little smaller than the one that Courtney Latimer found. And so eventually when Erdman got his hands on that one, he described it as a new species.

Yeah, I mean, it turns out that at one point, hundreds of millions of years ago, there were potentially over 100 different varieties of this fish. And they came in all shapes and sizes. These obviously were pretty big, but there were some that were smaller and faster. Basically just kind of a wide variety.

And as far as we know, I think are these the only two known survivors? Yes. So far. Yeah, the one that Courtney Latimer found are known as the West Indian Ocean Sealacanth. Those are the blue ones. They're typically found off of the east coast of Africa,

south of Kenya, I believe. Down to about the Cormorose Islands. I think that they're actually also known as the Cormorose Island Sealacanth because that seems to be where they inhabit the most or the highest density of them is. Yeah, and some of the weirdos that have, well, we assume that they've been extinct,

but you never know. One of them was toothless and over 10 feet long. That was the Megalo Sealacanthus. Very appropriately. Some of them said, forget you ocean. I'm gonna go to the freshwater. So there were actually freshwater sealacanths at one time. And like I said, some of them were slow and ambushed prey.

Some were smaller and faster, but they've pretty much universally all been predators from what I've seen. Right, and the two species that are alive today that we know of are, aside from that Megalo Sealacanth, tend to be a little bigger than the extinct species. Which I read is a good, it's a good example of why they shouldn't be

called living fossils, which is what they're frequently called. Yeah, that's Darwin's term for something that basically never changed. Right. And they've actually studied the genome of the sealacanth and found that they very much haven't changed. And kind of the main reason is they haven't had to.

They've kind of stayed in the same places. And when you stay in the same places and you eat the same stuff, then maybe you don't change so much. I read the opposite of that, that they have changed enough that they have been evolving and a good example of that

is that they're bigger than they used to be. Oh, interesting. Yeah, but the two species that are alive today, they have traced their genomes back and decided that they've been separated for several million years at least. Yeah, this one, they finally got the full genome and they said that it does indeed match the fish's

appearance of slower evolution in a journal published in Nature because they have a slower rate of substitution. Gotcha. Basically, the doctor, well, I guess she is a doctor. Just sounded weird to say that. The doctor.

The researcher who was also a doctor who was, she said it may reflect the fact that they do not need to evolve quickly because they've lived in relatively unchanging environment where there are few predators and they basically haven't needed to change over time like other organisms. Well, that brings up another thing too.

There's a big question. Why would they just drop off of the fossil record if they'd been around this whole time? If they didn't just go extinct 80 or 65 million years ago, the only explanation I've seen is that the places where the fossils turned up were areas conducive to fossilization, like there was a lot of sediment

that could turn bone into rock. And then the areas that the living species live at now are not conducive to that kind of thing, possibly because they're mostly living around volcanic rock that doesn't necessarily produce fossils. You want to take a break? Yeah, let's take a break and we'll get back and talk a little bit about this funny fish.

On the podcast, HeyDude, the 90s called David Lasher and Christine Taylor, stars of the cult classic show, HeyDude, bring you back to the days of slip dresses and choker necklaces. We're going to use HeyDude as our jumping off point, the day of the 90s. We lived it and now we're calling on all of our friends to come back and relive it. It's a podcast packed with interviews, co-stars, friends,

and non-stop references to the best decade ever. Do you remember going to Blockbuster? Do you remember Nintendo 64? Do you remember getting frosted tips? Was that a cereal? No, it was hair. Do you remember AOL Instant Messenger and the dial-up sound like poltergeist?

So leave a code on your best friend's beeper because you'll want to be there when the nostalgia starts flowing. Each episode will rival the feeling of taking out the cartridge from your Game Boy, blowing on it and popping it back in, as we take you back to the 90s. Listen to HeyDude, the 90s called on the iHeart radio app, Apple Podcasts, or wherever you get your podcasts.

Hey, I'm Lance Bass, host of the new iHeart podcast, Frosted Tips with Lance Bass. The hardest thing can be knowing who to turn to when questions arise or times get tough, or you're at the end of the road. Ah, OK, I see what you're doing. Do you ever think to yourself, what advice would Lance Bass and my favorite boy bands

give me in this situation? If you do, you've come to the right place because I'm here to help. This, I promise you. Oh, god. Seriously, I swear. And you won't have to send an SOS because I'll be there for you. Oh, man.

And so will my husband, Michael. Um, hey, that's me. Yep, we know that, Michael, and a different hot, sexy, teen, crush boy bander each week to guide you through life step by step. Oh, not another one. Kids, relationships, life in general can get messy. You may be thinking, this is the story of my life.

Just stop now. If so, tell everybody, yeah, everybody about my new podcast and make sure to listen so we'll never, ever have to say bye, bye, bye. Listen to Frosted Tips with Lance Bass on the iHeart Radio app, Apple Podcasts, or wherever you listen to podcasts. Oh, stuff you should know. All right.

So we've talked a little bit about what makes the sea lacanth such an interesting critter. Can a critter be a fish? Yeah. Have you heard of the cuddle fish? That's a critter, if there ever was one. Yeah, a cuddly critter. So here are some remarkable things about the sea lacanth.

They can live as deep, I mean, they're deep water dwellers. They can live as deep as 2,000 or more feet. But generally, they think they generally live about 500 to 800 feet in what they call the twilight zone, which is still pretty deep. Remember our cave episode? Yeah. That had the same thing.

Remember, there was organisms that live in the dark, organisms that live in the twilight zone, and organisms that live in the lighted zone. These guys live in that threshold between light and dark in the ocean. And they apparently are nocturnal hunters. Yeah, they come out at night, kind of stay hidden. Most of these habitats are caves that they tend to stay in.

But there's one off of Tasmania that do not live in caves. And so they have officially been placed on an endangered list because they don't have the protection from bycatch that these other cave dwellers have. Right. That makes sense. So the average day in the life of a coelacanth, at least the cave-dwelling species,

during the daytime, they're hanging out in a cave. They'll hang out in a cave with, I've seen, between up to 12 to 16 other coelacanths. Yeah, have a little coffee. Yeah, maybe just talk. Yeah. Talk about their night. And then as night falls, they'll leave their caves

and they'll go hunting. And like you said, they're carnivorous predators. They do that passive bycatch thing for the most part, where they let the current bring the food to them. But they just basically hang out and wait for a cuttlefish. It's one thing they eat, squids, other cephalopods, some fishes. But they seem to not show aggression toward one another from what I understand.

Yeah, and while they are passive hunters, they do have an unusual feature, which is, like we said, one of many, but they have what's called a rostral organ, which just means it's in the nasal region in their snout. And it's filled with a jelly-like substance that they think, and they think most of this stuff. I mean, they've done a lot of good studying, but for something so rare, you can't be super sure.

But they think that it detects low-level electrical signals and frequencies from prey. Yeah, like a shark or a ray. Yeah. It's an electrosensory organ, where when living tissue contacts water, it can make an electrical impulse that can be picked up. Yeah, and this cool mental floss article

is, I think, 11 things about the sealic ant. I can't remember how it was put. But just 11 interesting features. 11 fishy facts, unfortunately. That's why I forgot it. Title aside, it's an interesting article. And one of the things that they don't know why they do, and I have a feeling it has to do with that electrical

frequency, is they'll swim nose down for up to two full minutes, which is weird for a fish. They're just kind of hovering in place, headstanding, right? Yeah, and I guess, I mean, if they have that nasal bag of jelly that helps them locate fish, I would imagine that's what they're doing there, right? I imagine it like tanto, like holding a railroad track. You know?

Yeah. I think it's the same thing, basically. So when they catch their prey, they eat them. And they can eat stuff that's way bigger than them, because, again, which is unique to sealic ants among living things, they have a hinge in their cranium that allows, basically, their head is convertible. The top of their skull can retract, allowing their mouth

to open really wide. So they can eat a large, large cuttlefish. Yeah, and I think that feature also allows it to their mouth to close with much greater force. With extreme prejudice. Yeah, like when it's unhinged emotionally and physically, it can really close that mouth super hard. They hate themselves for eating cuttlefish,

because they just can't stop. So those are just a couple of the features. Another is, and we mentioned earlier that the name literally translates into hollow spine. This is because they have what's called a notochord, which is a hollow pressurized tube filled with oil, where a lot of fish start this way, and then they'll eventually get a spine. But this doesn't go away.

Right, and not just fish vertebrates. Apparently, there's a lot of mammals that go through this. I think possibly even humans in the embryo. And the celacanth just says, I'm good with the notochord. I'm going to stick here. Yeah. I'm going to stop here. Which is strange.

It is strange. You want to hear some more strangest? I could do this all day. Well, it's a strange fish. Celiacanth, we don't quite understand how they reproduce. And the reason why is because males don't seem to have any sex parts. They don't have junk.

They think possibly males grow it when they need it. But otherwise, it's not around. They're growers. They're not showers. Right, exactly. That's exactly right. So we have no idea how they reproduce. But we know that the mode of reproduction

is called ovoviviparity, which is however the eggs that the female has get fertilized, once they're fertilized, they gestate or the eggs develop in the female. And then they hatch in the female. And then the live fishes continue to gestate. And the whole period lasts like three years before they're born. So they go from egg to being hatched to being born within a three-year period.

And so apparently, this does not make the mom, Celiacanth, very happy. And sometimes, she will try to eat her newborn pups. So supposedly, Celiacanth pups, that's what they're called, can dive really deep, very quickly, the moment they're born. To get away from mom. To get away from their mom, who's like, three years, three years. Paging Dr. Freud.

Yeah. Yeah, I think sharks may be the only other fish that give birth to live little ones. Is that right? I mean, most fish lay eggs. Right. So it's definitely unusual. Yes, it may not be unique.

But the other thing about their sexy time is there's also a theory that they are monogamous. Yeah, I saw that too. In 2013, a German team, they had a couple of corpses of two pregnant. I believe the African version, yeah, the Latamira Chalumne. And because, I don't remember what the other one was, it was Latamira something else for the Indonesian version.

Yeah. We'll just go with that for now. I was practicing pronouncing it, Latamira menadoensis. OK, wow. Thanks. Nice work. So they analyzed these two pregnant ladies, unfortunately, that were no longer with us.

And they found out that they had, like most definitely, had a single father, which they said was unusual. Sure. Because one of them had 26 little baby pups inside of her. Right. And they thought at first, well, maybe it's because the celacanth is so rare that the female wouldn't have opportunity to mate with more than one male.

And they said, well, wait a minute. Well, that's true. Well, no, not necessarily. Once they found out that they stay. They hang out together. Yeah, in caves all day long. What else are you going to do? Once General Hospital's over, just looking around at everybody

like, well, what do you want to do? Yeah, that's a good point. All right, well, let's ponder that and take another break. And we'll finish up with even more interesting things about the celacanth. On the podcast, Hey Dude, the 90s, called David Lasher and Christine Taylor, stars of the cult classic show, Hey Dude,

bring you back to the days of slipdresses and choker necklaces. We're going to use Hey Dude as our jumping off point, but we are going to unpack and dive back into the decade of the 90s. We lived it. And now we're calling on all of our friends to come back and relive it.

It's a podcast packed with interviews, co-stars, friends, and nonstop references to the best decade ever. Do you remember going to Blockbuster? Do you remember Nintendo 64? Do you remember getting Frosted Tips? Was that a cereal? No, it was hair. Do you remember AOL Instant Messenger and the dial-up

sound like poltergeist? So leave a code on your best friend's beeper, because you'll want to be there when the nostalgia starts flowing. Each episode will rival the feeling of taking out the cartridge from your Game Boy, blowing on it and popping it back in, as we take you back to the 90s.

Listen to Hey Dude, the 90s, called on the iHeart radio app, Apple Podcasts, or wherever you get your podcasts. Hey, I'm Lance Bass, host of the new iHeart podcast, Frosted Tips with Lance Bass. The hardest thing can be knowing who to turn to when questions arise or times get tough, or you're at the end of the road. OK, I see what you're doing.

Do you ever think to yourself, what advice would Lance Bass and my favorite boy bands give me in this situation? If you do, you've come to the right place, because I'm here to help. This, I promise you. Oh, god. Seriously, I swear.

And you won't have to send an SOS, because I'll be there for you. Oh, man. And so will my husband, Michael. Um, hey, that's me. Yep, we know that, Michael. And a different hot, sexy teen crush boy bander each week to guide you through life, step by step.

Oh, not another one. Kids, relationships, life in general, can get messy. You may be thinking, this is the story of my life. Oh, just stop now. If so, tell everybody, yeah, everybody, about my new podcast, and make sure to listen, so we'll never, ever have to say bye, bye, bye. Listen to Frosted Tips with Lance Bass on the iHeart

radio app, Apple Podcasts, or wherever you listen to podcasts. All right, so these guys have live babies. Yep. They might mate with a single mate. G'day. They have, uh, they can unhinge their jaw to eat more. Right. They have a jelly filled thing in their nastra.

That detects electricity. That detects electricity. That detects electricity. That detects electricity. That detects electricity. I know, I'm having trouble saying detects, too. Uh, what else? This is sort of a recap.

They have an oil filled spine. Oil filled spine. They're just good with, they're like, I don't need a real spine. This one's my favorite. They were long thought to be the missing link between the fishes and the tetrapods, which are land dwelling, four-limbed animals. Yeah, because a notable thing, I don't think we mentioned yet,

is that they have an oil filled spine. A notable thing, I don't think we mentioned yet, is this thing has, well, I think I did a quote from Miss Latimer, Courtney Latimer, but they have four fins that move, sort of like you would think legs would move if a fish could swim out onto the beach. Legs and arms. Yeah. Can you remember how Shaggy walked in Scooby-Doo?

I do. Just like that. That's basically how a seal can't swim. Yeah. And the fact that their fins are suspiciously arm-like in appearance, just made people think that even more. What's more, their arms, what are called lobes, are attached by a bone that is compared to the humerus in humans.

Yeah. So a lot of people said, well, that's it. It's a missing link. The seal can't. There's a missing link between the fish and the land dwelling four-limbed animals. Yeah. And apparently once the genome came around, they said now... A little disappointing.

They said, yes, we're all related. Actually, we are all what are known as sarcopterigians, which means we are fleshy limb vertebrates. So we're all that. Gross. So we are related, but it's not like our direct ancestor. In fact, we're more closely related to the lung fish than the sealicanth. But the sealicanth holds this place of honors, probably living on something of its own branch, and is a very close cousin, if not bro, of the lung fish.

So we're related by marriage to the sealicanth, say. But legally, we probably could marry a sealicanth and have it not be super creepy. Right. Except for the fact that it's a fish. Right. You can feel its fleshy lobe fin stroking the back of your head as you kiss it. I got something for you. I'm just walking right past that one.

They taste gross, so don't think it's some weird delicacy. Right. Not that there are that many of them to eat. But apparently, if you do eat them, they can make you sick because these things are filled with urea, with oil, with wax ester, and fat. Like 98.5% fat. That's just in its skull. Oh, I thought that was the whole body. No, its brain occupies 1.5% of the area inside its skull.

The other 98.5% is fat. And that's at the point that they're an adult. Right, yes. Supposedly, their brains are bigger proportionately when they're younger. And they just stay there. Yeah. They're frozen in perpetual, like, I guess, toddlerhood. Pretty much.

They love life. Yeah. No responsibilities. No bills. They just want to watch after them. Yeah, exactly. What else? Oh, I got one for you.

Okay. Pistigial lungs. Oh, yeah. Man, I love these things. So, they grow. They had CT scans done, and this is from the Mental Floss article of these embryos. And they start growing little lungs early in the gestation period. And it slows down a bit.

And then by the time they're an adult, the organ serves no purpose. Yeah. It's just there. Yep. That's a good one. It is. It's almost like the celacanth was an attempt, an evolutionary attempt. And it's just like, I'm going to scrap this design.

Let's move on to the long fish. Yeah, maybe so. You know? One of the things that struck me, though, Chuck, was when they were talking about how a couple of females that had fully formed young in them, ready to be born, were caught. It's like, that was a lot of the celacanth population that got wiped out with those two caught fish. Yeah, I mean, if there are only hundreds, then everyone matters. Yeah, they think that there's possibly about a thousand of the ones that live around Indonesia

and far fewer of the ones that live off of the west coast of Africa on the western side of the Indian Ocean. And as a result, both of them are on the endangered species list. They're both protected. And the problem is, if something happens to these species and these species die out this time, the whole order is gone for good this time around. Yeah. Unless we revive them with some of their DNA.

Yeah. All right, I got one last one. Okay. And this was on Mental Flosses list as well. Okay. Under the title, a prominent hematologist once wrote a celacanth operetta. All right. So that's an attention grabber.

Yeah. And apparently in 1975, there was a man named Charles Rand of Long Island University. And he was a hematologist and was doing some work with the celacanth. And this was when the big revelation was, they learned that it gave birth to live young. And he, I guess, was a music guy and decided to write a little operetta about this discovery titled, A Celacanth Lament, or Quintuplets at Fifty Fathoms Can Be Fun. All sung to the tune of various Gilbert and Sullivan songs. Right.

I love that. That's a hematologist for you. Wow. For sure. I have no comment on that. I mean, it speaks for itself. Other than I wish this was on tape somewhere. Surely it's on YouTube.

Everything's on YouTube. You think? Yeah, sure. You want to go over some of these other quote, living fossils in quote? Yeah. So again, there's some fishes out there that may have made the jump kind of to land or almost did or what have you. But there's some interesting fishes that are worth mentioning.

Speaking of making the jump, did you see that shark that jumped into the boat the other day? No. There was a fisherman, and I guess the shark just did one of their famous, it was a great white, did one of its breeches where they just jump out of the water. Everything did that and landed in a dude's fishing boat. Wow. And he got banged around a little bit, but was not like, you know, a bit or anything. And basically went into his little control room, I think, and called for help.

And this shark, like, I mean, it was kind of sad. I think the shark just died. But there were pictures of it. It's huge. It's like eight feet long. Oh, my goodness. It was not a little guy. Yeah.

Do you imagine? No. Oh, my God. That guy did the right thing. He ran. He pooped his pants, too. He jumped into the water. How did that happen?

All right. So living fossils, the bow fin. Yeah. The dogfish, mudfish, or grindle. I like dogfish. Yeah. This guy, I looked all these up. He lives in the Mississippi River Basin in the Great Lakes and other places and are pretty

mean, supposedly. Eat small mammals, snakes, frogs, other fish. Yeah. They'll go after you. Right. It's sort of normal looking. Just sort of a long fish. Nothing remarkable is appearance-wise, though.

I'll tell you one that's remarkable. Appearance-wise is the gar. Yeah. You know, I just saw a long-nosed gar. They are so ugly. Last weekend, and I was like, it was floating dead in a lake. I was like, what in the world? Because I went by it at first.

I was like, was that a swordfish? Right. Well, no, it's not a swordfish. Right. But in the long-nosed ones, I mean, this thing had a 12-inch beak. Oh. I mean, it looked prehistoric. Yeah, they very much do look prehistoric, which is one of the reasons why they're called

a living fossil. And they are just mean. Apparently, they're known to kill other fish, not even to eat them. Yeah. Just because they were in their way, basically. Yeah, like you see this nose? Yeah. And you can't eat gar.

They're inedible. And as a matter of fact, if you eat their eggs, it will kill you. They're very toxic to humans. Yeah. And they just go around killing other fish. So they're not the best thing to have in your lake if you like to fish in a lake. No. And did you ever see Vernon, Florida, the documentary?

No, I've never seen that one. By the great Errol Morris. It has one of the interviews. It's one of my favorites with a guy talking about the garfish. Oh, really? Yeah. I got to see that one. Come across one of those.

Oh, boy. I finally saw a thin blue line for the first time. Yeah, that's a good one. It is really good. You probably saw it after the parody of Documentary Now. Yeah. I definitely did. I saw the Documentary Now one of those.

Which they nailed. It's like perfect. They really do. One of the great shows. What's next? Hagfish? Yeah. Mud dwellers?

Yeah, they basically look like eels, but they're fish. But the interesting thing about hagfish, aside from the fact that they don't have any eyes, is that they eat fish from the inside out. Yeah, I think you underplayed it when you said they basically look like eels. It looks like something out of dune. Okay. Like the body looks like an eel, but have you seen the front end of this thing? Sure.

It's frightening. Oh, yeah. And to think about that crawling up in you and eating you from the inside out. Right. Because if you're a dead or dying fish and you're like, oh, man, I hope I hurry up and die before a hagfish finds me. And a hagfish swims down your throat and then eats you from the inside out. That's a bad day.

That's not a good death. No. And then lastly, what about the sturgeon? Love the sturgeon. Did you know that they are both freshwater and saltwater here in North America? I did not know that, but I know one thing is they're huge. Yeah, they get up to like 20 feet long. Yeah, and I didn't see any pictures of them that big, but I've seen pictures of fishermen

with like sturgeon that look like they're at least eight or nine feet long. Right. And they're crazy looking. Yeah. I'm not surprised that they are largely in North America because I always associate them with the Baltic area where the beluga sturgeon is prized for its caviar. That's what I always think of when I think sturgeon. Well, I didn't realize that that's where beluga came from either.

Yeah. And they have armor like skin and they're these retractable mouths that I guess there are different varieties, but some of them look almost like alligators from like the head forward. Yeah, they're weird looking fish. Yeah. But they don't want to hurt anybody. They just want you to eat their eggs. Is that true?

Yeah. They're like the giving tree of the lake. All right. Up with sturgeon. Uh, you got anything else? I got nothing else. But if you want to know more about living fossils like, you know, sealic ants. Or us.

Right. You can type those words in the search bar at howstuffworks.com. And since I said search bar, it's time for listener mail. Uh, I'm going to call this my mom married Bob Dorough. Oh, I like this one. Did you see that one? Right. And I thought it was because that was the subject line.

Right. And then the very first line of the email was sorry about that attention grabbing subject line. Right. And I thought it was a lie because a lot of times people say something remarkable. Yeah. In the subject line that is completely false, which always ticks me off. Sure.

But this is true. Uh, my mom married the wonderful talented and sweet Bob Dorough 23 years ago. And, uh, if you didn't listen to the show, Bob Dorough was, um, part of the genius behind schoolhouse rock. Mm hmm. Um, make me, you know, the original genius. Right. Uh, it was wonderful to hear you two speak so highly of them in your recent podcast.

My own family listens to you guys a lot. So to hear you speak of our Bob was such reverence. It warmed our hearts. Uh, when you, uh, when you mentioned early in your podcast that you wished you could have gotten Bob on the show. I wanted to jump through my phone to say, I can make that happen. Uh, Bob learned about you guys about two weeks ago when we took a short road trip for Mother's Day and listened to the grave robbing episode.

Um, how awesome is that? I know the guy listened to us right before we released the schoolhouse rock episode. Yeah. So he was primed and ready to hear us mention it. Fortuitous. Yeah. Uh, he chuckled off in during the ride and when we got to our destination, he asked us something to the effect of who are those comedy guys, they're good man.

That made me feel good. Yeah. Uh, and then to have the schoolhouse rock episode pop up a few weeks later. It was like, whoa, you guys were spot on in your characterization of Bob as a creative genius. A lot of his genius comes from his hard work. The age of 93. He is still traveling the world taking gigs.

That's awesome. Uh, my mom often complains that he doesn't know how to say no. Uh, thank you for giving Bob and schoolhouse Rockets proper due next time you come up the coast, the northeast, that is, we'll be there and I'm sure Bob won't say no. And that is from Pete, uh, I guess his stepson. Yeah. And, um, Pete sent in a picture of he and Bob and that's him in the flesh. It's pretty awesome.

Pretty neat. And you should go to www.bobdoro d-o-r-o-u-g-h.com and just check it out 93 and going strong. Nice going, Bob. Thanks for listening to us and thank you, Pete, for writing in to let us know that we were spot on about what a great guy he is. Yeah, we were genuinely thrilled to hear this. Yeah. Uh, if you want to genuinely thrill us, you can tweet to us at S-Y-S-K podcast or I'm

at Josh, um, Clark. You can hang out with us on facebook.com slash stuff you should know or slash Charles W. Chuck Bryant. Uh, you can send us an email to stuffpodcast at howstuffworks.com and as always join us at our home on the web, stuffyoushouldknow.com. For more on this and thousands of other topics, visit howstuffworks.com. On the podcast, Hey Dude, the 90s called David Lasher and Christine Taylor, stars of the cult classic show, Hey Dude, bring you back to the days of slip dresses and choker necklaces.

We're going to use Hey Dude as our jumping off point, but we are going to unpack and dive back into the decade of the 90s. We lived it and now we're calling on all of our friends to come back and relive it. Listen to Hey Dude, the 90s called on the iHeart radio app, Apple podcasts or wherever you get your podcasts. Hey, I'm Lance Bass, host of the new iHeart podcast, Frosted Tips with Lance Bass. You ever think to yourself, what advice would Lance Bass and my favorite boy bands give me in this situation?

If you do, you've come to the right place because I'm here to help and a different hot sexy teen crush boy bander each week to guide you through life. Tell everybody, yeah, everybody about my new podcast and make sure to listen so we'll never ever have to say bye, bye, bye. Listen to Frosted Tips with Lance Bass on the iHeart radio app, Apple podcast or wherever you listen to podcasts.