 |
 Portrait of a boy riding a nøkk in the form of a water horse, by Theodor Kittelsen | |
| Sub grouping | Lake monster Sea monster Sea serpent Lake serpent |
|---|---|
| First attested | 18th century |
| Other name(s) | Kelpie, Waterhorse |
| Region | Celtic nations Scandinavia |
| Habitat | Water |
A water horse (or "waterhorse" in some folklore) is a mythical creature, such as the Ceffyl Dŵr, Capaill Uisce, the bäckahäst, each-uisge, and kelpie.