Variations: Nauthvalur, Nautshval (Ox-whale); Nautfiskur (Ox-fish); Kýrhvalur (Cow-whale); Fjósi (Byre-whale); Baulhveli (Bellow-whale); Búrhvalur, Sperm Whale


The Nauthveli or Nauthvalur (“Ox-whale”) is one of the many illhveli or “evil whales” of Iceland. It is the second biggest of the evil whales, and like the others, it is inedible and will show up if its name is said out loud.

A nauthveli is a toothed whale, bicolored much like a cow. The large head is similar to that of a bull and has two nodules on top. The trunk tapers off, wormlike, and lacks fins.

However, the nauthveli is named not for its appearance, but rather for the terrifying bull-like bellow it makes when hungry, a sound like that of roaring, maddened bulls. The call of a nauthveli is made in the open sea or near the shore, and can be heard reverberating over long distances. The vibrations cause the ground to shake and knock oars out of sailors’ hands. Going out to sea is forbidden if nauthveli bellowing can be heard.

As will all evil whales, the nauthveli delights in killing men and scuttling smaller boats, but it has a particular fondness for beef. The bellow of a nauthveli is hypnotic to cattle, compelling them to run off cliffs and headlong into the sea. There the nauthveli plays with them like a cat does with a mouse before biting them in half and eating them. The whales are attracted to cattle on board ship; one nauthveli off Grimsey harassed a vessel until they released the one cow on board, who promptly dove into the sea. Cattle have to be locked up for days until the nauthveli’s spell wears off, and indeed cow-herding was strongly discouraged in areas where nauthvelis had been heard. Sacrificing one bull or cow usually satisfies the nauthveli, making it safe to go out to sea again.

Gudmundsson listed the nauthveli as synonymous with the búrhvalur or sperm whale.


Davidsson, O. (1900) The Folk-lore of Icelandic Fishes. The Scottish Review, October, pp. 312-332.

Hermansson, H. (1924) Jon Gudmundsson and his Natural History of Iceland. Islandica, Cornell University Library, Ithaca.

Hlidberg, J. B. and Aegisson, S.; McQueen, F. J. M. and Kjartansson, R., trans. (2011) Meeting with Monsters. JPV utgafa, Reykjavik.


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