One of the primeval sea monsters that will appear in The Kaligen Experiment will be like a mix between Spinosaurus, Mosasaurus, and Pliosaurus. It will be as big as the largest Mosasaur and have the fluke-like tail of a Mosasaurus, the large fins of a Pliosaurus, and the head of a Spinosaurus. I essentially made the most frightening prehistoric sea monster I could think of.