Why Did Ichthyosaurs Go Extinct?
ichthyosaur were one of the most successful lineage ever . These dolphinfish - looking marine reptiles of the Mesozoic Era evolved to occupy a huge compass of niches : Some were massive apex predators hunt in the open ocean , others were little suction feeders float in shallow seas . All ichthyosaurs went nonextant tens of millions of year before the dinosaurs were pass over out during the noted Cretaceous - Paleogene extinction event ....