A Finnish water spirit, a nix. It was believed that certain bottomless lakes were the entrances to the kingdom of the näkki. The water spirit emerged from his abode and came to visit the earth at sunrise and sunset.
- Aldington, Richard, transl. (1987). New Larousse Encyclopedia of Mythology. New York: Crown Publishers, Inc.
- Eberhart, George M. (2002). Mysterious Creatures: A Guide to Cryptozoology. Santa Barbara: ABC-CLIO, Inc.