The Liopleurodon is one of the main antagonists in Hell's Aquarium. In the book, the creature is living in the Panthalassa Sea, being the largest creature there, at a length of 122 feet, with a weight of upwards of 200,000 pounds. It soon gets into a fight with Angel over a kill that the large albino Megalodon had made. When Angel gets caught in a fishing net, the Liopleurodon kills her. It then goes after David Taylor and his girlfriend Kaylie. It kills Kaylie, and then leaves. As a result, David enters a depression. This creature is also notorious for killing Scarface, one of the antagonists of Primal Waters. The Liopleurodon is set to return in MEG: Night Stalkers.