There are plesiosaurs, ichthyosaurs and mixed dragons in the balloon man sea. Most of the marine reptiles in the Ji Dynasty were plesiosaurs and ichthyosaurs, which were similar to plesiosaurs, named undiscovered dragons, and the adult body length was less than 1 m. It is the largest amphibian ever, living in water and feeding on fish. Mixed dragon, a well-known primitive ichthyosaur, is more adapted to life in water than other reptiles. Mixed magic dragon, a reptile living in the ocean, is considered to be the ancestor of plesiosaur.