|Named By:||Wiffen in 1980|
|Time Period:||Late Cretaceous|
|Location:||New Zealand, North Island|
|Size:||12 meters long, skull 78 centimetres long|
|Fossil(s):||Partial skull, vertebrae, ribs and metacarpals (from the flippers)|
|Classification:||| Chordata | Reptilia | Squamata | Mosasauridae | Mosasaurinae ||
|Also known as:||| Mosasaurus flemingi | Rikisaurus tehoensis ||
Moanasaurus (From Maori moana "sea" and Greek sauros "lizard"; meaning "Sea Lizard") was a genus of mosasaur from the Late Cretaceous period. Its fossil remains have been discovered in the North Island of New Zealand. Moanasaurus was a very large mosasaurine known originally from a disarticulated skull, vertebrae, ribs and paddle bones. It reached 12 m in length and the skull is 78 cm, which shows that Moanasaurus was one of the largest in the family of mosasaurinae.