Liopleurodon Tylosaurus “Sauropteryiga is the Superorder of Marine Reptiles that dominated in the Mesozoic era... Sauropterygia “Halisaurus was a mosasaur. It reached 20 ft long and weiged 1 ton. It ate seabirds like... Halisaurus “Platecarpus was a small mosasaur, reaching 19 ft long. Platecarpus “Hainosaurus was a Giant Mosasaur. It was 60 ft long! Hainosaurus “Kronosaurus was 35 ft long, and was breifly futureed in Sea Monsters. Kronosaurus “This pliosaur reached 30 ft! Plesiopleurodon Pages in category "Prehistoric Reptiles" The following 8 pages are in this category, out of 8 total. H Hainosaurus HalisaurusK Kronosaurus L LiopleurodonP Platecarpus Plesiopleurodon S SauropterygiaT Tylosaurus Retrieved from "http://marinereptiles.wikia.com/wiki/Category:Prehistoric_Reptiles"