These are an aquatic type of reptile and like some aquatic reptiles, have 4 fins. They do not possess long necks like some plesiosaurs do, but are more dolphin shaped instead. Pliosaur fossils have been found in Africa, Australia, China, Europe, North America and South America. Pilosaurs are probably most well known from their grotesque looking teeth. The swimming sharptooth seen in The Land Before Time IX: Journey to Big Water is one such type. Liopleurodon is the only Pliosaur in the Land Before Time series.