This whale with legs. | 12 Weird Prehistoric Creatures That Will Make You Glad You’re Alive Today “Dorudon is a wonderful example of an intermediate stage in the evolution of modern whales from legged terrestrial animals, for this animal possessed a pair of hind flippers,” Csotonyi says.
LIOPLEURODON was the biggest plesiosaur. Liopleurodon was not a dinosaur, but a short-necked plesiosaur (a pliosaur), an extinct, swimming reptile. It lived during the late Jurassic period in Europe and Eastern Europe. It was a carnivore which ate fish,ichthyosaurs, and other plesiosaurs. 39 to 49 feet (12-15 m) long. It had a long body with a large head, a short neck, powerful jaws and teeth, and four long, wide, paddle-like flippers. The skull was 10 feet (3 m) long.