The Devil Whale

The Devil Whale is a legendary demonic whale-like sea-monster (or a sea-turtle in some legends). According to myths, this whale is of enormous size and could swallow entire ships. It also resembles an island when it's sleeping, and unsuspecting sailors put ashore on its back. When the sailors start a fire, the Devil Whale awakes and attacks the ship, dragging it to the bottom of the sea. Because of this, Christianity began associating the whale with the Devil. This story is found in Sindbad the Sailor.