44 Largest Extinct Reptiles - Size Comparison = (Plesiosaurs Pliosaurs Ichtyosaurs Mosasaurs)

Sea Monsters! The largest 44 extinct ocean and sea reptiles. These prehistoric lizards were based on fossilized skeletal remains, theoretical size ranges, concept art, and my own creativity. All these creatures breathed air and did not have gills as they were not fish. Plesiosaurs: Elasmosaurus, Hydrotherosaurus, Thalassomedon, Styxosaurus, Albertonectes, Cryptoclidus, Brancasaurus. Pliosaurs: Svalbard Pliosaurus, Pliosaurus rossicus, Pliosaurus macromerus, Kronosaurus, Pliosaurus funkei, Brachauchenius, Pliosaurus kevani, Pliosaurus carpenteri, Liopleurodon, Rhomaleosaurus, Macroplata, Peloneustes. Ichtyosaurs: Shastasaurus, Shonisaurus, Temnodontosaurus, Guanlingsaurus, Cymbospondylus, Excalibosaurus costini, Ophthalmosaurus, Ichthyosaurus‭. Mosasaurs: Mosasaurus hoffmannii, Prognathodon saturator, Hainosaurus, Plotosaurus tuckeri, Tylosaurus, Prognathodon waiparaensis, Prognathodon giganteus, Plotosaurus bennisoni, Prognathodon lutugini, Plioplatecarpus. Nothosaurs: Nothosaurus giganteus, Nothosaurus zhangi. Sea turtles: Archelon, Protostega. Sea snakes: Palaeophis colossaeus, Pterosphenus, Palaeophis grandis. Checkout my whales video! Music Credits: Screen Saver by Kevin MacLeod