Kappa

These demonic little creatures can be sighted in Japanese waters. It is similar to a dwarf with a tortoise shell, webbed hands, a beak, scraggly hair, and a dip in the top of its skull. The water it holds in the dip in its skull holds all its energy, you can stop a Kappa by bowing to it and making lose its energy when the water falls out. This strange beast is known to attack people, and is a fairly well believed creature from Japanese mythology.