Selkies are shape-shifting creatures that can fake the forms of seals and beautiful people. In some myths, they are gentle creatures that dance in the moonlight on beaches, but in others, they seek unsatisfied people to seduce whether they are married or not.
Selkies were mythical creatures that could transform themselves from seal to human form and back again. The legend of the selkie apparently originated on the Orkney and Shetland Islands where selch or selk(ie) is the Scots word for seal.
Tales once abounded of a man who found a beautiful female selkie sunbathing on a beach, stole her skin and forced her to become his wife and bear his children, only for her to find the skin years later and escape back to seal form and the sea.