Laplace

Laplace is a large sea Pokémon that resembles a plesiosaur. It has a blue hide with darker blue spots and a cream-colored underside. It has large brown eyes, a short horn on its forehead, and tightly curled ears. It has a long neck and four flippers. The foremost flippers are larger than the hind. On its back is a heavy, gray shell covered in blunt knobs.

Laplace is a gentle, helpful Pokémon that enjoys ferrying people across bodies of water. In the past, its docility made it an easy target for hunters, and it was driven to near-extinction. Recent protection efforts have seen Laplace become overabundant instead, which is now affecting the fish Pokémon numbers in some areas. An intelligent Pokémon, it is able to understand human speech. Laplace have been known to travel in large pods across the seas, spanning both polar and tropical areas. To keep in touch with other of its kind, it sings enchanting melodies.

(Source: Bulbapedia)