ichthyosaur
Ichthyosaurs (Ichthyosauria) were an order of large marine reptiles existing during the same time as dinosaurs, but were not dinosaurs themselves. They were once the top predator order during the late Triassic and Jurassic periods, but were replaced by plesiosaurs as the top predator in the late Jurassic and Cretaceous periods. Ichthyosaurs went extinct about 90 million years ago, during the late Cretaceous period.…
