Giant sea turtles

Quetzalcoatlus northropi

up to 30 centimeters long

supporting the idea that it spent most of its time above the ocean

Pliosaurus brachydeirus Neovenator Giant sea turtlesPliosaurus brachydeirus was a marine plesiosaur reptile of the Pliosauridae family that lived during the Late Jurassic , primarily in the KimmeridgianTithonian age (approximately 155150 million years ago) . Its remains come mainly from marine deposits in southern England , within the context of the ancient European epicontinental sea , and the species holds an important historical role as one of the first pliosaurs formally described in paleontology.