Some ancient marine reptiles, such as the leatherback turtle Eosphargis breineri (top), the ichthyosaur (middle), and the mosasaur (bottom), had color schemes similar to modern - day sea creat
Ichthyosaurs, which are similar - shaped to dolphins and sharks, but are reptiles, swam the seas for millions of years during the Triassic, Jurassic and Cretaceous periods.