Tylosaurus was a giant Mosasaur. It reached 96 ft long! Its body looked like that of a modern eel, but they weren't related. Tylosaurus came from the Late Cretaceous, and was the top predator of the seas. It would have hunted prey like Archelon, a giant prehistoric turtle. It was the largest carnivore ever to live on the plane!
Tylosaurus featured in Sea Monsters: A Prehistoric Adventure, and in Chased by Sea Monsters!