I mean, the animal eating it is also technically a plesiosaur

@Michael Hamm its a mosasaur right

@@martinpagac7422 Pliosaur

@@rgio1885 yeah now that ive seen the video i know:D

@@martinpagac7422 Nope. It looks a lot like a Pliosaurus, a member of Pliosauridae, which is one of the subgroups of Plesiosauria, along Plesiosauroidea (and a few others) Mosasaurs are not closely related to Plesiosaurs at all, aside from both being reptiles afaik Edit: I now see that I am far too late. Apologies

@moo moo same, they're both great

This video summed up reasonable answers to my decades of questions about how such a strange marine reptile thrived. I used to think that they hunted like eels, but with a bigger body. Sneaking up on fish by pretending to be the same size via the long neck is a very interesting theory.

The Jaws / mouth Evolution video was sheer brilliance

after these reptiles died out, mammals did the same. Land mammals evolve to live under the sea and some grew to gigantic sizes, e.g. blue whales(largest known animal in entire Earth's history). Other mammals include dolphins and sea otters. Birds, the only descendants from dinosaurs also adapted to live in seas. E.g. penguins. However they are not 100% aquatic and still need to step foot on lands.

I love how this channel about evolution talks about evolution

Kind of scary for me reflecting. I recall being a very young child first understanding my inner nerd learning about dinosaurs in my public school on herman street and then for some reason I got taused around a bunch of groups to conform to thier ever changing low standards of a low so called evolution to now find myself back as a nerd appreating myself and not wanting to be swayed by sales people but open to true fellow life scientists

A foggy window... cause you never know if the pictures are exactly accurate

I love this Placodont animals most of all sea reptiles. It is so very pity that they died out at the end of Triassic....

@@Tyra-2534 I know right. I would have loved to see them when they were around

@@nathanmciver6737 it is a wonderful fascination that has persisted into my adulthood

What a smart kid! A lot of the kids I see who are into dinosaurs are unfortunately only familiar with the outdated concepts… but your nephew seems like a super smart kid if he understands evolution at this age!

what a heartwarming comment… little dude is 9 now, is he still super into dinos?

Very relevant remarks. This is one great YTer and I am a big fan too!

I completely agree

Spot on

ah i see im not the only one that watches this shit at night right before sleep xD

@@rudivomschauerberg6344absolutely!😂

Stunning...but also absolutely terrifying!

@@GerardWay4President like most extinct animal species.

Extremely pleasant and calming voice + eloquent + informative + interesting... What's not to enjoy

How do you not now why? I really think you just told yourself you don't know why and didn't even try to think of why, which is highly idiotic.

Yeeeeeessssss. Very relaxing

@@valeriavagapova Better than most tv shows these days.

Learning is rewarding - understanding how we came to exist as we do today is definitely interesting and that's good for the mind. The enjoyment you feel is your brain rewarding you for expanding your understanding of the world. We're inherently curious creatures, we're wired to enjoy this sort of thing.

The one chomping is also a plesiosaur albeit a short necked one

Hahahahahahah

@@killerkoffee4619 thats a mosasaur Buddy

@@killerkoffee4619 maybe a pliosaur, but still not plesiosaur

long as it got chomped after it reproduced that counts as evolutionary success

“It’s a magical leopleurodon, Charlie! Yeah, Charlie! Magical leopleurodon!”

I don't get it.

@@thunderlizardstudios2645 ever watched “Charlie The Unicorn?” It’s a classic by FilmCow.

@@drsharkboy6568 oh

@@thunderlizardstudios2645 The joke is that I'm old, and so are the people who get the joke.

at first i read, imagine how the aliens must have looked back then, and i thought now that's a whimsical question haha

@@milu3779 that's actually a good question, primitive extinct alien ancestors..

Probably not that alien, just very exotic

@@milu3779 Well, here's what was happening on Snaiad back in the Mesozoic: 250-183 million years ago: Modern “Vertebrates” with four legs, two heads and hydraulic muscles diversify and dominate most terrestrial ecosystems. Most of them, however, belong to archaic lineages such as Archaeognaths, Tridactyls, Tetradactyls and Polydactyls. Continents approach present positions. Rampant Hexapods still hold out in Oroland, then an island continent. 183 million years ago: Mass extinctions claim many Archaeognath, Tridactyl and Polydactyl species. Tetradactyls are wiped out, Hexapods almost so. Evolution of Spinostomes and Lophophids. The continent of Thalassia forms after an orgy of mid-ocean volcanism. Declining forests of giant trees give rise to first pinnacle ranges. 183-80 million years ago: Spinostomes and a second radiation of Polydactyls dominate most ecosystems. First Jetocete-like animals develop. Most “Vertebrate” herbivores still lack well-developed food processing systems. Arthrognathans diversify underwater, one group launches a second invasion of land almost 800 million years after terrestrial Arthrognathans die out. Poorly-understood “vertebrate” groups colonize Thalassia, the origin of Monoanticherans, Titans and Tromobrachids. Sproglands expand over mainland continents. Indigenous tetrapod “Vertebrates” replace Hexapods on Oroland, still an island. 80-40 million years ago: Many modern “vertebrate” lineages, including advanced herbivores, evolve. The final flowering of advanced Spinostomes on mainland continents is followed closely by their rapid decimation in the face of new competition.

@@parmaxolotl silly me i had forgotten all about Snaiad :D

poorf?

@@Thejghostodst Cetarthrosaurus was dated to the Albian to Cenomanian stage of the early cretaceous.

Malawania also seems to have lived up to the middle Early Cretaceous (132-125 Ma), Platypterygius even longer, living up to Late Cenomanian (94.3 Ma).

@@philloraptor8205 yes, at that point though the group had be becoming increasingly rare. Honestly moth light should do a video on the evolution of ichthyosaurs.

There is some evidence that one lineage persisted for some time but they were quite specialized and didn't rediversify like they had previously suggesting they had quite low genetic plasticity and eventually probably just faded away from competition. That said who knows when you have those dead walking taxa sometimes they are good enough to persist long after you would have thought due to the poor representation of the fossil record. That said none has been found past the Cenomanian-Turonian boundary or Anoxia event or Bonarelli event which seems to have been linked directly to the Caribbean LIP(Large Igneous Province). So while one lineage did survive the earlier extinction that wiped out their kin they probably were wiped out along with a lot of other marine reptiles in the next mass extinction. Interestingly that is also when the spinosaurids vanish from the fossil record too which suggests their aquatic diet lead them to face the same end as many other marine reptile groups when low oxygen content caused marine ecosystems to largely collapse. That event that likely did finish off the last Ichthyosaurs and spinosaurids however opened the way for the Mosasaurs to rapidly diversify into empty niches and claim the oceans as the top predators up until a major asteroid blasted into the coastline of Laurentia/North America.

PBS Eons already did video about it.

@@ExtremeMadnessX I saw but their delivery is a little over the top

@@pattonramming1988 PBS Eons also tends to be less accurate than this channel, they've made some truly inexcusable errors as a result of poor research.

@@bkjeong4302 I had no idea about that. Do you remember an example?

@@nowwhat8209 - taking the 1500kg mass estimate for Simbakubwa at face value despite the fact it was developed from a methodology known to be flawed. - claiming ground sloths in North American went extinct because things became too cold, when in fact they went extinct as things were getting WARMER (meaning they were more likely wiped out by humans, since the climate was turning in their favour). Then claiming that South American ground sloths got huge to specialize for living in cold climates and became extinct because things got too warm (citing Megatherium as an example), while ignoring that a) Megatherium actually lived in warm climates (again, a likely human-driven extinction here for this reason), and that b) there were plenty of small/medium-sized sloths in South America (and one giant one in North America), so it’s wrong to claim SA ground sloths in general became large and cold-specialized. - Their megalodon video originally claimed that in the Pliocene, newly evolved cetacean competitors like Livyatan and orcas contributed to megalodon going extinct, ignoring that a) cetacean competition was not this new unstoppable force, but something that had been a factor sharks had been handling since the Late Eocene, before megalodon even existed, and that raptorial cetaceans were actually going extinct left and right towards the end of meg’s existence (and likely for the same reasons that later killed off megalodon), b) Livyatan evolved in the Miocene, not the Pliocene, and that it actually went extinct at around the start of the Pliocene (a couple million years BEFORE megalodon did), and c) from the available fossil evidence, orcas did not become raptorial predators until after megalodon and all the earlier raptorial cetaceans were gone (the only orca remains that come close to the right age belong to Orcinus citoniensis, and this is a much smaller animal than living orcas and with teeth far less suited for eating large prey; even if we include hunting in groups, this thing likely wasn’t competing with megalodon for prey). Do note that PBS Eons may have realized this mistake, because these issues seem to have been removed. - They parrot the claim of borophagine canids being outcompeted by cats despite the fact this hypothesis never made any sense, because cats (including large-bodied ones) entered North America at the start of the Middle Miocene, before borophagines even became a dominant group of large predators. Borophagines had been handling competition with cats since before they actually became apex predators and they managed just fine, so the idea competition from cats outcompeted them makes little sense. - Same with their terror bird video-the idea of North American predators outcompeting South American predators during the Great American Biotic Interchange has been mostly overturned, as the South American predator guild (especially apex predators) had been in severe decline since the Late Miocene and all but collapsed around 3MYA, prior to the main pulse of the GABI that allowed their competitors to enter South America. At best, competition from North American competitors was a minor-secondary factor in Titanis going extinct, and cannot be blamed for killing off terror birds as a group-they were already on death’s door before that point from climate-related reasons. - In fact, pretty much all of PBS Eon’s arguments in various videos about animals outcompeting and displacing other animals at the group level are parroting poorly supported or even outright disproven hypotheses that only have stuck around due to the fact they’ve become memetic, with nobody bothering to point out all the flaws with these hypotheses.

What about plessie from 3D world? She's even named after the plesiosaur.

Just think of Lapras

That must have really been a sight to see!

I love this theory, thanks for painting that picture in my mind haha

Supercavitation? Its an animated dinosaur! Time to stop believing all this dinosaur rubbish!

@@Yatukih_001looks guys I found the idiot

@@Yatukih_001 I mean, it's not even a dinosaur...

But it’s ain’t a dinosaur

Marine reptile XD Lol easy mistake to make.

What about tortoises?

may be may not be.

@@ritushree6504 This is where I love science.

@@blondbraid7986 tortoises are a type of turtle

May not be. They’re also thought to be anapsids.

Cosmic Arc yes!

How exactly do we know anything about how the deep sea has developed over time? Since we can’t dig on the ocean floor yet

Shun the nonbeliever! Shun! Shhhhhhhhhhuuuuuuuunnn.

He’s showing us the wayyyy!

No, no it isn't. For the last time, I'm not a fricking unicorn!

arent they like underwater elephants

My thoughts exactly. There is evidence that a elasmosaur swallowed a juvenile mosasaur from stomach contents. But I'm sure such a massive animal with a 2 foot skull with large teeth could attack small mosasaurs as well as wounded animals

Your two comments suddenly made me want to be a plesiosaur. They’re badass!

Possibly the small size of the head and the long distance to the main body makes the head appear like a small fish to other fish.

@@johnsamu yeah , it might be a reason , altought idk if a fish might have mistaked the head for a fish , but it's very likely we'll never really know ...

just wait

Sharks have existed for at least 420 million years, surviving a number of mass extinctions. But it doesn't seem like they'll survive us.

Marko Ellis Mrdjenovic nah they definitely will. They’re populations are sadly plummeting, but deep sea shark populations have gone almost completely unscathed. They will survive us :)

@@olivera6743 That is good to know but even if the deep sea sharks survive, having all the other species die out will relegate sharks to a peripheral niche - not the widespread group affecting marine ecosystems to the extent they are today.

this is the way

It is my favourite Pokémon for that reason as well.

It;'s being eaten by a pliosaur....which is itself a plesiosaur.

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Walking with monsters on its way to make Liopleurodon absolutely huge

The way Plesiosaurs breathed was also very interesting, as the likely just stuck their heads out of the water vertically, unlike the common depiction of the whole body floating on top of the water

I found the comment!