Prehistoric Marine Animals List

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.

Prehistoric marine animals list. Examples of Mesozoic Era animals include dinosaurs pterosaurs ammonites sharks plesiosaurs ichthyosaurs mosasaurs pseudosuchians insects and early mammals. The coelacanth is the best example of a living prehistoric creature we once thought extinct. Hyaenodon is a genus of large carnivorous mammals that lived from the Eocene to the mid Miocene epochs.

The largest of these animals stretched up to 20 feet 6 meters long with the Tanystropheus 12-vertebrae neck comprising more than half of that sources. A small oily fish of the Atlantic and Pacific providing food for many fish marine mammals and birds. Some of the earliest land animals happened to be spiders and insects.

Here are 10 of the scariest prehistoric sea monsters to ever call the ocean home in prehistory. - predators include the Shastasaurus a reptile 21 meters 68 feet long. A large edible sea snail of coastal waters.

The remains of other animals missing limbs or bitten in half are a macabre proof of this giant caimans appetite. The largest Hyaenodons were among the largest predators of their time. Or Top 10 Sea Monsters if you prefer 10- Dunkleosteus.

Plus science-minded entertainment sources like the Discovery Channel love creatures that. Fossils of steppe mammoth up to 15 feet 45 meters in height and nine to 11 tons in weight have been found. 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.

Megalodon is probably the best-known creature in the list. 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. Here are ten of the largest most fearsome sea monsters ever to prowl the oceans.