Liopleurodon means "smooth-sided tooth;" it was named by French paleontologist H.E.Sauvage in 1873.

Diet: Liopleurodon was a carnivore (a meat-eater), which ate fish, ichthyosaurs, and other plesiosaurs. It caught prey with its long, sharp teeth.

Anatomy: Liopleurodon was from 39 to 49 feet (12-15 m) long. It had a long body with a large head, a short neck, powerful jaws and teeth, and four long, wide, paddle-like flippers. The skull was 10 feet (3 m) long.

Fossils: Fossils of Liopleurodon have been found in England, France, Germany, and eastern Europe.