Pliosauridae is a family of large marine reptiles that lived during the late Jurassic to the late Cretaceous periods. These creatures are part of the order Plesiosauria and are characterized by their robust bodies, large heads, and powerful jaws. Pliosaurs were apex predators in their aquatic environments, preying on fish and other marine animals. Pliosaurids had short necks compared to their long-necked relatives, the plesiosaurs. They are known for their strong limbs, which evolved into flippers, allowing them to swim efficiently. Fossils of pliosaurids have been found in various locations around the world, providing valuable insights into their diversity and evolution.