Mermaid

A mermaid (from Middle English mere in the obsolete sense 'sea' + maid(en)) is a legendary aquatic creature with the head and torso of human female and the tail of a fish. The male version of a mermaid is called a merman; the gender neutral plural is merfolk. Various cultures throughout the world have similar figures. Much like Sirens, mermaids 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 can't breathe underwater, while others say they drown men in spite.

It has been widely suggested that manatees or dugongs could be behind the "myth" of the mermaid.
The Sirens of Greek mythology are sometimes portrayed in later folklore as mermaid-like; in fact, some languages use the same word for both creatures. Other related types of mythical or legendary creature are water fairies and selkies.

In Splash (1984), starring Daryl Hannah. Hannah played a mermaid who fell in love with a man. She could walk dry land as a human female, but whenever water touched her legs they changed into a fish-tail.

Nix (also known as Näcken, Nøkken, Näkki, Nixy or Nixe) are water creatures in German and Scandinavian folklore, usually shown in human form. The name Nix is related to the Anglo-Saxon nicor, and Old High German nihus, all designating some kind of water fiend.

In Slavic mythology, a rusalka (plural:rusalki) was a female ghost, water nymph, succubus or mermaid-like demon that dwelled in a waterway.

Mermen are mythical male legendary creatures who are human from the waist up and fish like from the waist down, whose consorts were their female counterparts, the more commonly known mermaids. In Greek mythology, mermen were often illustrated to have green seaweed like hair, a beard, and a trident.

Many aruge that it a merbutler is a more appropriate name for the men of the species.

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