These oceans and seas were populated with now extinct marine reptileextinction event, in which many groups, including non-avian dinosaurs, pterosaurs, and large marine reptiles, died out.
These oceans and seas were populated with now extinct marine reptileextinction event. Many groups died out in now extinct marine reptileextinction event. This was including non-avian dinosaurs. This was including pterosaurs. This was including large marine reptiles.