Prehistoric Marine Animals List

Shastasaurus the largest marine reptile species ever found was a variety of ichthyosaur.

Prehistoric marine animals list. A bright-colored fish of coral reefs. Megalodon didnt earn its nickname Big Tooth for nothing. It lived back in Cambrian times first appearing over 500 million years ago and when fossils of it were first found the various disassociated parts of it were described as jellyfish the mouth shrimp tails large grasping appendages and a sponge the body.

They gave birth to live young which means they may have been warm-blooded. The ichthyosaurs were marine predators that looked like modern dolphins and could reach a massive size during the Triassic period over 200 million years ago. The largest Hyaenodons were among the largest predators of their time.

Hyaenodon is a genus of large carnivorous mammals that lived from the Eocene to the mid Miocene epochs. Here are 10 of the scariest prehistoric sea monsters to ever call the ocean home in prehistory. From what paleontologists can decipher of this reptiles remains the Tanystropheus appears to have been a prehistoric reptile version of a giraffe with shorter legs a long neck that juts out rather than up and a massive tail.

The coelacanth is the best example of a living prehistoric creature we once thought extinct. Examples of Mesozoic Era animals include dinosaurs pterosaurs ammonites sharks plesiosaurs ichthyosaurs mosasaurs pseudosuchians insects and early mammals. Top Ten Marine Predators.

But at 60 or so tons the middle Eocene Basilosaurus was certainly the biggest prehistoric whale that ever lived outweighing even the much later Leviathan which itself may have tangled with the biggest prehistoric shark of all time Megalodon by 10 or 20 tons. Some other interesting - and terrifying. From here you will have entries for the dinosaurs but also other creatures of the Mesozoic like the pterosaurs early mammals ancient crocodiles and the first birds Other index entries will be for the mammals that became the dominant life forms of the planet after the dinosaurs with entries from the sabre toothed cats to the first whales You will even find entries for animals that are prehistoric but.

Megalodon is probably the best-known creature in the list. Megalodon is probably the best-known creature in the list. It appeared in the oceans of the world about 360 million years ago during the Upper Devonian period and died out almost at the same time as the dinosaurs pterosaurs and marine reptiles at the end of the Cretaceous period.