Legendary aquatic creatures with the head and torso of human females and the tail of a fish. The male version of a mermaid is called a merman; gender-neutral plurals could be merpeople or merfolk. Various cultures throughout the world have similar figures.

Much like sirens, mermaids in stories would sometimes sing to sailors and enchant them, distracting them from their work and causing them to walk off the deck or cause shipwrecks. Other stories would have them squeeze the life out of drowning men while trying to rescue them. They are also said to take them down to their underwater kingdoms. In Hans Christian Andersen's The Little Mermaid it is said that they forget that humans cannot breathe underwater, while others say they drown men out of spite.

Mermaids are one of the most famous creatures of popular culture, and are depicted regularly in literature and film. This is likely due to the influence of Hans Christian Andersen's fairytale The Little Mermaid (1836), which has been translated into many languages and adapted into various media. Andersen's portrayal has arguably become the standard, and has influenced most modern Western depictions of mermaids since it was published.

Legend and myth

Tales of mermaids are nearly universal. The first known mermaid stories appeared in Assyria, ca. 1000 BC. Atargatis, the mother of Assyrian queen Semiramis, was a goddess who loved a mortal shepherd and in the process killed him. Ashamed, she jumped into a lake to take the form of a fish, but the waters would not conceal her divine nature. Thereafter, she took the form of a mermaid — human above the waist, fish below — though the earliest representations of Atargatis showed her as being a fish with a human head and legs, similar to the Babylonian Ea. The Greeks recognized Atargatis under the name Derketo, where she was often conflated with Aphrodite.

Prior to 546 BC, the Milesian philosopher Anaximander proposed that mankind had sprung from an aquatic species of animal. He thought that humans, with their extended infancy, could not have survived early on. This idea does not appear to have survived Anaximander's death.

A popular Greek legend has Alexander the Great's sister, Thessalonike, turn into a mermaid after her death.[2] She lived, it was said, in the Aegean and when sailors would encounter her, she would ask them only one question: "Is Alexander the king alive?" (Greek: Ζει ο βασιλιάς Αλέξανδρος;), to which the correct answer would be "He lives and still rules" (Greek: Ζει και βασιλεύει). Any other answer would spur her into a rage, where she transformed into a Gorgon and meant doom for the ship and every sailor onboard.

Lucian of Samosata in Syria (2nd century AD) in De Dea Syria ("Concerning the Syrian Goddess") wrote of the Syrian temples he had visited:

"Among them - Now that is the traditional story among them concerning the temple. But other men swear that Semiramis of Babylonia, whose deeds are many in Asia, also founded this site, and not for Hera Atargatis but for her own Mother, whose name was Derketo"

"I saw the likeness of Derketo in Phoenicia, a strange marvel. It is woman for half its length, but the other half, from thighs to feet, stretched out in a fish's tail. But the image in the Holy City is entirely a woman, and the grounds for their account are not very clear. They consider fishes to be sacred, and they never eat them; and though they eat all other fowls, they do not eat the dove, for she is holy so they believe. And these things are done, they believe, because of Derketo and Semiramis, the first because Derketo has the shape of a fish, and the other because ultimately Semiramis turned into a dove. Well, I may grant that the temple was a work of Semiramis perhaps; but that it belongs to Derketo I do not believe in any way. For among the Egyptians, some people do not eat fish, and that is not done to honor Derketo."

Mermaids were noted in British folklore as both ominous, foretelling disaster, and provoking it. Several variants of the ballad Sir Patrick Spens depict a mermaid speaking to the doomed ships; in some, she tells them they will never see land again, and in others, she claims they are near shore, which they are wise enough to know means the same thing. They can also be a sign of rough weather.

Mermaids could also swim up rivers to freshwater lakes. One day, in a lake near his house, the Laird of Lorntie saw, as he thought, a woman drowning, and went to aid her; a servant of his pulled him back, warning that it was a mermaid, and the mermaid screamed after that she would have killed him if it were not for his servant.

On occasion, mermaids could be more beneficient, giving humans means of cure.

Some tales raised the question of whether mermaids had immortal souls to answer it in the negative.The figure of Liban appears as a sanctified mermaid, but she was originally a human being transformed into a mermaid; after three centuries, when Christianity had come to Ireland, she came to be baptized.