Cirein cròin

Cirein cròin is a sea serpent in Scottish mythology. It is believed to be the largest of all living creatures. It is said that seven whales are an easy meal for it. According to local folklore this serpent is able to take the shape of a little, silver fish when fishermen come into its territory. In this way, the monster avoids being sighted by them. Other versions say this monster becomes the small silver fish to attract the fishermen and make them catch it. It would then return to its original shape, eating the fishermen.