Pliosaurus or Predator X is the largest predator of the Jurassic Ocean. It lived in the island luster known as Europe during the Jurassic. They rely on there large heads to catch there food. Its prey is everything that is smaller than it including Kimmerosaurus and Ophtalmosaurus including there own kind. They swim deep waters and spend allot of time in dark water so they can surprise there prey. They will fight other Pliosaurus for territory.