A reminder: dinosaurs did not swim, they did not fly. They only roamed terra firma.
Ancient Sea Reptiles: Plesiosaurs, Ichthyosaurs, Mosasaurs, and More, Darren Naish, c. 2022.
A Smithsonian Book. The author: a paleontologist. British.
Years: 252 - 66 million years ago.
Mesozoic: Age of Reptiles.
Triassic, Jurassic, and Cretaceous.
The Mesozoic marine reptiles occupied the roles filled today by seals, dolphins, and whales.
There were five main Mesozoic marine reptile groups:
- shark-shaped ichthyosaurs;
- the (mostly) long-necked plesiosaurs;
- the crocodile-like thalattosuchians or sea crocs;
- the giant swimming lizards known as mosasaurs;
- the sea turtles;
They were not dinosaurs and they were not closely related to them.
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