The term 'mythical swimmer' refers to two mythical creatures from Greek and European folklore: the NAIAD and the Mermaid. A NAIAD is a type of water nymph, a female spirit associated with a particular body of water such as a lake or river. Naiads were believed to be able to grant wishes and bring good luck. A Mermaid is a legendary aquatic creature with the upper body of a woman and the tail of a fish. Mermaids are often associated with sailors and the sea, and were believed to be able to grant wishes and bring good fortune.