A Complete Guide & Timeline of Prehistoric Sharks | Dinosaur Documentary
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- Опубліковано 2 сер 2024
- Today, we will be taking you on a natural history of 450 million years, where we will encounter some of the most bizarre, fearsome and wondrous creatures the world has ever seen. We will encounter not only the sharks themselves, but their immediate relatives - rays, sawfishes, skates and guitarfishes. Starting from the very first sharks, right up to the modern day, we will observe deep-dwelling leviathans, sharks with scissor-like mouths, giants that were known to prey on whales, and, surprisingly, some of the smallest and strangest animals that ever roamed the waves. Join us now, on an oceanic voyage of prehistoric sharks.
0:00 Introduction
2:54 The Silurian And Ordovician Periods - The Sharks Evolve
7:12 The Devonian Period - The Age Of Fishes Arrives
11:38 The Carboniferous Period - The Sharks Diversify
15:27 The Permian Period - A Ruling Kingdom
19:13 The Triassic And Jurassic Periods - Usurped
23:47 The Cretaceous Period - The Sharks Rise Again
29:46 The Cenozoic Era - Modern Diversity Begins
36:18 Outro - Where Are The Sharks Now?
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Sharks are the most resilient things in nature next to crocodiles. They both survived several mass extinctions and evolved.
I disagree! With people here on earth! Sharks are now endangered species.
@@ghostshirt1984 he said nothing about humans or endangered . There is nothing to disagree about. They are resilient, dont think you understood what he wrote
Well , sharks are older than trees, so there's that
@@ghostshirt1984 thats only because of dumb humans being dumb humans
I think you'll find that microbial life is the all-time champion in that regard.
This is some highly educational unintentional ASMR.
something to note is that while finning is absolutely still a problem that exists, the vast majority of shark deaths are due to unintentional bycatch or getting caught in ghost nets, not targeted fishing for fins. focusing on finning makes it harder for actual effective policy to be put in place (such as online petitions demanding shark finning be made illegal in the US, unaware that the practice is already illegal and has been since 2000), and also often devolves into xenophobia. "why sharks matter" by david shiffman is a great book about threats to shark and how you can support effective shark management!
Wait so if the finners try fish for something else entirely, they'll catch even more sharks?
Seems counter intuitive.
@@xengen212 No, there's just much more fishing that targets other species
@Brachiophore sarcasm not a strong point I see.
@@xengen212 Well, I've seen dumber questions on the internet, so you never know. But I guess it was just an attempt at a joke then.
actually I don't believe bycatch is the biggest issue. There is definitely a ton of bycatch killing sharks, but I'm pretty sure the vast majority of sharks killed are the targeted fishing of the spiny dogfish that constitutes the biggest proportion of the 100million sharks killed. Only spiny dogfish have numbers high enough to barely sustain such fishing pressure, and they are fished for products in many Western countries for dog food, fertilizer, table fare, and fish oil. You're correct though that the message at the ending unfairly targets finning as the culprit.
Just shows how amazing and resilient these creatures are this why they are my favourite animals
Mine too, amazing animals.
Sharks are beautiful animals and they all need protection from us
you mean from china
I'm being serious mind. When I hear the word shark I think of the times I've been in the water with them, swam alongside them and seen them do their thing. A creature which basic bodily shape hasn't changed all that much since the Devonian period some 400 million years ago. A sleak, powerful, efficient and effective predator that survives. Whether it be Stethacanthus some 400 million years ago, or megalodon or the great white which I've seen up close in person in open water or any other species of shark past, present or future. They'll still continue to be amazing creatures and that's why I like them, I respect them.
The narrator really helps me sleep
Such a good video!!! So happy to see an episode on sharks!
Me too
My favorite shark's are the Salmon sharks and the Porbeagle shark because one is like a specialized version of a great white shark/the other a large specialized mako shark. Both able to have their internal body temperature 🌡️ way above the surrounding water. Which is an INSANE capability that allows them to be way faster and agile than it's prey in the colder waters that it hunts in. It's amazing they are able to do this. That's not even including all the other amazing traits sharks have/like sensing electric pulses from creatures muscles to find prey.
sharks, not shark's
more agaile, not agile
its, not it's
,,not/
creatures', not creatures
@@Dr.IanPlect I appreciate the grammar parking ticket 🎟️
I'll work on checking my late night typing is acceptable so people can understand the point I was trying to get across. Many people have simple mistakes from their phones keyboard auto changing after you type & press space. At least I hope I showed I have part of a brain, by showing some understanding of sharks, biology and unique traits some creatures possess? (Grammar spelling has never been my strong suit)
@@benmcreynolds8581 That had errors too, but I tip my hat anyway.
@@Dr.IanPlect hahahaha I told you. Grammar is not my strong suit...
Feel free to follow any of my future posts and help me improve my grammar. I'd sarcastically appreciate it lol 👍🏻
@@benmcreynolds8581 👍
*Insert Jaws theme here* 🦈
Insert Jews Theme Here 🦈
These videos are great!
Thank you for an educational, honest video on sharks! I especially appreciate the nice calm voice. So many animal videos have spastic narrators and obnoxious "music"!
I like that you made sure to note that most of the Carboniferous and Permian “sharks” were not really sharks but stem-chimaeras, but but this is also the case for Cladoselache, which you identify as a “true shark”. Come to think of it, the fact that so many of the earlier fish in this video aren’t sharks makes me think it could’ve just covered the full history of cartilaginous fish, rays and true chimaeras included.
By the way it’s theorized that stethocanthus aka the island boarding shark wasn’t actually a shark but was part of a different group of cartilaginous fish called the chimeras. There’s still a few members of this group of fish alive today like the elephant fish and the rat fish.
That is also the case with Helicoprion and Sarcoprion.
I absolutely love these episode! 👏
I enjoyed that, thank you.
YES!! ❤
Thanks for this excellent video.
Sharks are extremely beautiful and interesting either prehistoric or actual.
incredible video, i do recommend😊 putting it on a faster speed though
Sharks are almost Second Fiddle to other animals from the Devonian with the Armored Fish through the Mesozoic with the Marine Reptiles and now in the Cenozoic with Mammals. Even Megalodon had stiff competition from Whales. I feel kinda sad for them. Still a Great Video and Great Job! :)
The Habsburgs of predatory animals for sure. Not always on top but surviving and abiding their time until it is their chance again to be on top of the food chain.
This is an excellent and accurate documentary. Thank you!
I collect fossil shark teeth, vertebrae and so forth. It's fascinating to see how they evolved and diversified over hundreds of milions of years.
You asked about the first image that comes to mind and I thought about the huge ikea plush... I'm screwed.. XD
I love this video, very interesting 😊
Something interesting is early sharks had to stay small and nimble to out maneuver the bigger predators of the Devonian like Dunkleostious and Hyneria. Kind made me start sensing a pattern. Something starts off small to avoid bigger threats and when those threats are gone they explode into a variety of forms. Sound familiar?
Actually, increases in size has been directly correlated to an increase in predation and predator size. So growing larger is absolutely a defensive evolutionary trait.
@@AncientCreature-i2o well bigger isn’t always better I mean look at early mammals for example. They had to stay small to avoid being eaten. Early sharks most likely had to do the same because of the bigger predators. Plus being small has its advantages. You can hide in places nothing else can get you in. You can be faster and your body demands less fuel to keep going.
Sharks are the result of eons of trial and error, streamlined to perfection, evolutionary masterpieces.
Always fascinating; sharks. Long before the movie Jaws, and the book 'The Old Man & the Sea', Sharks have been an issue to Sea Faring peoples.
Sharks have been getting killed on site, BEFORE man knew there were so many different species.
Fishermen, proud to have reeled in a 10' Great White, we now know was just a juvenile shark. It makes me wonder, if humans didn't nearly decimate the Great Whites, would they & the Meg turn out to be one-&-the same? Is Megaledon a fully mature Great White?
I will always wonder.
that was such a coll and highly informatc video!
‘Shark’ definitely brings the great white to mind. 🦈
My favorite shark is the bull shark. They are tough intelligent creatures that dont get the recognition they deserve.
These sharks look they were just making stuff up or like a 7 year old boy was making stuff up
good show
prehistoric sharks good show
Spiny Sharks.... They looks like tiny cute "chest bursters" with eyes 😂❤
Wobbygong sharks are the stealthiest creatures. They know exactly which environment suits their skin tone the best.
First thing comes to me when I hear shark sushi 😂
Maybe there is a simple answer for this. If sharks have no bones, therefore no body parts to fossilize, how can certain weird body features be determined?
The metaspriggina is the first complete organism that sharks evolved from. It was a boneless leaf shaped fish with no fins.
Insects are the most resilient they were some of the first creatures to exist and survived until modern day and are the largest species on earth
Edestus: the world's first industrial-kitchen-size can opener!
(As far as we currently know...)
There's also the Goblin Sharks from Malibu Shark Attack & before anyone ask, yes the Goblin Shark is real & point frankly very rare.
It's no surprise why sharks are still around
First two sharks I though of were goblin and frilled
My favorite will be megadon shark
Megalodon*
BTW, the plural of genus is genera!
Helicoprion has to be one of the weirdest extinct sharks.
Species of sharks on earth today, I would say Goblin sharks and Cookie Cutter sharks are very weird.
My favorite is still the Great White (beautiful looking sharks and Apex predator)
I know it’s really unlikely, but with megalodon, I kind of wish scientists would eventually discover that it was actually just a couple inches long, but with a BIG-ass mouth, lol. Not sure why, but that would be the funniest shit…. The mental image is ridiculous, haha
A real megamouth...3 ft long mouth b as big as a Volkswagen 😊😅
Very interesting video. Unfortunately, your narrator's voice would be better reading bedtime stories to kids. Listening to this video came close to putting me to sleep.
Lil bruh. Let me get that soup to go !?!! 🙃
Make it 2
When youtubers hear the word “shark” they immediately think about the most watched video
Stethocanthus is the EWAC shark. Because it looks like one lol
someone should stop that handsome man before all the sharks are gone.
Plus, I wonder how much science REALLY knows about the appearance of certain sharks. As everyone know they didn't had a bone skeleton, so mostly they've found teeth. I always was laughing inside by thinking all the Megalodon teeth did belong to a shark, that wasn't nearly as big, but had a very broad and big mouth instead...
What? Of course sharks have a skeleton, they're vertebrates
Couldn’t the buzz saw shark have a head like a flounders
Except the big tooth
What you said is true to that idea
Interesting: the truly oddball fish shown at :56 seconds in (the one who looks like a political caricature) is a Mola, or Sunfish--a bony fish.
NOT a member of the shark taxa.
(I think the camera was trying to show a shark farther away and above, but the cameraperson got distracted by the attractive Sunfish weirdness!)
Also, the narrator comments on the remarkable diversity of sharks being around "before vertebrate life" made it on to land. True; but they were thriving before MULTICELLULAR life made it on to land!
(And now I'm off to top up my pedantry!)
Sharks. Broca's area, or the Broca area is a region in the frontal lobe of the dominant hemisphere, usually the left, of the brain with functions linked to speech production. 2/8/2021 and I lived again. Broca's aphasia (non-fluent aphasia) Mike Caputo, Year 1 Stroke Recovery, Up Up Up - Aphasia with attitude, Broca's Aphasia, Right-side Weakness, Mark's 22 years-old Stroke: Broca's Aphasia.
?
First shark I think of is Megalodon
Think for a second about what's the coolest looking land animal...Peacock...Giraffe...Spider.. Now what about ocean animals...Octopus...King Crab...etc...but the coolest HAS TO BE THE HAMMERHEAD SHARK
This narrator sounds like nick nocturne
This video has not nearly enough attention
Sharks are amazing creatures, if you disagree throw hands
I definitely have shark flavored autism
That's humans for you. They will be the last things left alive on this planet.
Great documentary, thanks for the upload.
This was great but dude please back away from your mic, the “boom” is really bad
0:35 aint they literally dead since sharks need to move to breathe or is this one of those species who isnt affected by this
Save the sharks! They are endangered species.
Ref to the quote at the end, that sharks has been painted as a mindless killer.
The ONLY "mindless killer " creature/life form to ever to exist on this planet. Throughout the entire history of life.. human beings aka Homo sapiens
11:13
Where is this shark fossil?
Sharks are made mostly of cartilage which doesn’t fossilize. What we know from sharks is 100% based on their teeth.
While cartilage doesn’t fossilize well, it DOES happen! Otherwise, there’d be no soft body fossils at all and we’d know nothing about a lot of prehistoric animals - such as what we have from the Cambrian explosion (burgess shales, for example). Many things need to be juuust right for those non-bones to fossilize, though.
@@TheaSvendsen okay - well - show me this shark fossil spoken of here -
@@Jaggerbush it's in the actual documentary if u watch all of it there is a part on it that's shows you the fossil
@@TheaSvendsen not disagreeing with you, but many soft body fossils are what they call compression fossil or a negative fossil if im not misstaken?
Basically a mold of the creature and not the creature itself.
@@Makabert.Abylon I believe it’s called trace fossils and those are not as rare as fossilized soft-bodied parts, if I recall correctly.
All the magnificent natural history of sharks will unfortunately but undoubtedly be snuffed out because of our desire for a bowl of soup!how very sad 😢
Nope. By Bycatch is the leading issue. Not targeted sharing.
This vid is atrocious!
mindless killing machines
I am 100% sure that some of the things they daidnin the videos are incorrect. Some.stuff didn't add up. Not a well made video sorry.
There was no "buzzsaw" shark, it's clearly the remnants of some type of mollusk thing, or completely made up. Y'all need to think a little bit, sharks are made up of cartilage.....
Uh, Helicorpion was absolutely a real living predator. It's tooth whorl was found with pieces of jaw bone. Sharks aren't entirely made of cartilage.
@@AncientCreature-i2o lmao, "jaw bone".
Unlistenable. Are you trying to put viewers to sleep? If so, you deserve a medal.