Liopleurodon was a massive sea creature from the Late Jurassic Period. It reached lengths of 50 ft long, and weights of 100 tonnes. The Great White Shark, in comparison, is about 5 metres long. The jaws alone of Liopleurodon were 3 metres long, big enough to swallow a mini cooper. Each tooth was half a metre tall.
Liopleurodon appeared in Walking with Dinosaurs. An adult male was guarding its territory, which was invaded by a smaller female. It fought her, and ripped one of her flippers, causing her to retreat. At the end, the male Liopleurodon was beached, by a tropical storm.