Ancient Australia was home to a great variety of fish, sea monsters, reptiles (including dinasours) and amphibians. Rhoetosaurus brownei dating from the Middle Jurassic (about 180 million years ago) is Australia's biggest dinosour, probably reaching about 15 metres in total length. Mcnamaraspis kaprios is an armoured fish from the Gogo Formation in Western Australia that lived 370 million years ago. Ninjemys oweni is a horned turtles from the Tertiary to the late Pleistocene (25 million to 20,000 years ago), known from Darling Downs, Queensland. It had horns on its head, a relatively , clubbed tail and short legs. Paracyclotosaurus davidi, a labyrinthodont amphobian from the Late Triassic (245-208 million years ago), measured about 2.25 metres in length and probably weighed more than a large human. Woolungasaurus glendowerensis is a plesiosaur, one of the best known of the Australian marine reptiles. It lived during the Early Cretaceous, 110 million years ago.
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