In ARK: Survival Ascended, the Oasisaur is a giant, invertebrate dinosaur that carries a platform on its back that can hold small biomes. Unlike many other dinosaurs, like the powerful bird Argentavis, the Oasisaur is very docile, and lives its life as a herbivore. However, even though the Oasisaur won't attack you, it is still a difficult creature to tame.