Ecomare

Instead of jaws, lamprey have a suction mouth with several rings of teeth. With these teeth, they can clamp themselves to the skin of other fish or marine mammals. They drink the victims' blood or body fluids through the wound. Should you see a lamprey, you wouldn't think they are fish since they have no scales or bones. They do have cartilage, like rays and sharks. They can be identified by the seven holes on each side of their head. Lamprey are anadrome fish, which means they spawn in fresh water, but grow up in the sea. Examples include the sea lamprey and the European river lamprey.