Tylosaurus was the T-rex of the ocean. Tylosaurus looked like a sea monster, but was more closely related to snakes and monitor lizards. Tylosaurus had a sepentine body like a snake. Tylosaurus also had serrated teeth like a Komodo Dragon. Tylosaurus had flippers like a sea turtle and a tail like a Yellow-bellied Sea Snake. So Tylosaurus was something like a hybrid between those 4 animals.