The diet includes fish and larger crustaceans. The distribution area reaches from Ireland to Iceland and Greenland, it is also found in the Skagerrak, Kattegat and in the western Barents Sea. It is also found in the Northwestern Atlantic ocean, for example on Georges Bank off the coasts of the USA and Canada, west of Greenland and along the Mid Atlantic Ridge to about 52˚N.
Tusk becomes sexually mature at 8 to 10 years of age (the age of maturity varies among areas). The identified spawning areas are off the coast of south and mid-Norway, south, and southwest of the Faroese Islands and Iceland. There are likely other spawning grounds.