Hydrotherosaurus and Tylosaurus dinosaurs jump out of the water attacking Pteranodons. Both plesiosaurids, they often engaged ea

- Image ID: EEC2EH
Hydrotherosaurus and Tylosaurus dinosaurs jump out of the water attacking Pteranodons. Both plesiosaurids, they often engaged ea
Stocktrek Images, Inc. / Alamy Stock Photo
Image ID: EEC2EH
Hydrotherosaurus and Tylosaurus dinosaurs jump out of the water attacking Pteranodons. Both plesiosaurids, they often engaged each other in fights over territory.