Hainosaurus
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Extinct (fossil)
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Hainosaurus is an extinct genus of marine lizard belonging to the mosasaur family. It was one of the largest mosasaurs, reaching lengths of about 15 m (50 ft) which made it the top predator of the Late Cretaceous seas. A giant mosasaur appeared in the BBC series Sea Monsters, a spin-off to the successful Walking With Dinosaurs. Various sources identify the creature as either Hainosaurus or the equally huge Tylosaurus.

