Mosasaur was a giant of the sea, a type of aquatic lizard that snaked on things that were also large. It had a unhinged jaw that would allow it to open its mouth wider to consume larger animals. It preyed on whales, sharks, squid, and also other mosasaurs. They had razor sharp teeth used to slash the flesh off their prey. Some species of mosasaur also fed on things like clams and had mushroom shaped teeth used to crush hard shells. Mosasaur was up to 50 ft in length, it had a large tail used for forward thrust through the water and a streamlined body.