1925 - a girl visiting the grave of her twin sister who died in a house fire the year before. Parents of the girl saw her, on many occasions, talking to her sister like she was playing in her room, but saw no one , until this photo was developed.
A mermaid is a legendary aquatic creature with the upper body of a human and the tail of a fish. In other folk traditions they can be benevolent, bestowing boons or falling in love with humans. Mermaids are associated with the Sirens of Greek mythology.