Much like sirens, mermaids sometimes sing to people and gods and enchant them, distracting them from their work and causing them to walk off the deck or run their ships aground. Other stories depict them squeezing the life out of drowning men while attempting to rescue them. They are also said to carry humans 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. The sirens of Greek mythology are sometimes portrayed in later folklore as mermaid-like; in fact, some languages use the same word for both bird and fish creatures, such as the Maltese word 'sirena'. Other related types of mythical or legendary creatures are water fairies (e.g., various water nymphs) and selkies, animals that can transform themselves from seals to humans.Ancient Near East

The first known mermaid stories appeared in Assyria, ca. 1000 BC. The goddess Atargatis, mother of Assyrianqueen Semiramis, loved a mortal shepherd and unintentionally killed him. Ashamed, she jumped into a lake to take the form of a fish, but the waters would not conceal her divine beauty. Thereafter, she took the form of a mermaid—human above the waist, fish below—though the earliest representations of Atargatis showed her as a fish with a human head and legs, similar to the Babylonian Ea. The Greeks recognized Atargatis under the name Derketo. 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 otherwise. This idea reappeared as the aquatic ape hypothesis in the twentieth century

A popular Greek legend turns Alexander the Great's sister, Thessalonike, into a mermaid after she died. She lived, it was said, in the Aegean and when she encountered a ship, she asked its sailors only one question: "Is King Alexander alive?" , to which the correct answer was: "He lives and reigns and conquers the world" . This answer pleased her so she calmed the waters and wish the ship farewell. Any other answer would spur her into a rage. She would raise a terrible storm, with certain doom for the ship and every sailor on board. 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"