with 68 cervical vertebrae, "mauisaurus" had one of the longest necks of any plesiosaur. it was large, over in length. like other plesiosaurs, it had a long slender body, with numerous vertebrae, allowing flexible movement. on its underside, "mauisaurus" had two sets of large flippers. these aided in swimming at high speeds, but may have also allowed the plesiosaur to venture onto shorelines for short amounts of time. "mauisaurus" was a carnivore, with sharp jagged teeth that would have been used to grip fish or squid.