Tradition / Region: German Mythology
Alternate Names: Nix, Näck, Nøkk, Nykur, Näkki, Neck, Nicker
Category: Mermaid
The Myth
Nixies are supernatural water spirits found throughout Germanic folklore, particularly in Scandinavian traditions. Their appearance and behaviour vary between regions. The German Nix and Scandinavian Näck are generally male, while the German Nixe is a female water spirit often depicted as a river mermaid. They inhabit lakes, rivers, streams, and waterfalls, where they can appear as humans, animals, or mysterious objects floating on the water.
Nixies are also known for their shapeshifting abilities. They may appear as musicians beside waterfalls, strange animals, or water horses. In Swedish folklore, the Näck can take the form of a horse, a dog, a cat, or even a floating treasure. Various traditions describe protective measures against these spirits, including placing a knife in the ground before swimming or throwing a piece of steel into the water. Calling a malicious nixie by its name was also believed to defeat it.
Other legends portray nixies as lonely beings who long for companionship or salvation. In a Swedish tale from Lake Fagertärn, a poor fisherman promises his daughter to a nixie in exchange for abundant fish. When she reaches eighteen, she refuses to become his bride and takes her own life rather than enter his underwater kingdom. According to the story, her blood turns the lake’s water lilies red.
Related spirits appear across Northern Europe under different names, including the Finnish and Estonian Näkki and the English knucker. Some traditions associate these beings with drowned people or dangerous waters, while others emphasize their connection to music, nature, and supernatural transformation. Together, these stories portray the nixie as an unpredictable spirit whose beauty and gifts may conceal considerable danger.
Sources
Wikipedia contributors. (n.d.). Nixie (folklore). In Wikipedia, The Free Encyclopedia. Retrieved February 14, 2026, from https://en.wikipedia.org/wiki/Nixie_(folklore)