Sorting type: Most visited Most visited Alphabetical | Pages in category "Prehistoric sea life" Plesiosaurus Brygmophyseter Stethacanthus “ Hybodus is an extinct species of shark from Permian-Cretaceous period that you can find in... Hybodus “ This article is a stub. You can help the Zoo Tycoon Wiki by expanding it. Additional... Nothosaurus Subcategories Underwater biomes