It is usually found at a depth between 200 and 500 metres. The tusk’s natural habitat is on stony bottoms, where it spends its whole life. It matures at 8-10 years of age and spawns off the coast of south and mid-Norway, and in an area between Scotland, the Faroe Islands and Iceland. Spawning occurs between April and August, when the female lays up to 2 million eggs. The larvae live as a pelagic fish until they are approximately 5 cm long, at which point they migrate to the seabed. The tusk can live more than 20 years.
Some tusk is caught as bycatch with trawl. In Norway tusk is mainly caught by the Norwegian longline and gillnet fisheries.
Tusk is sold in the following forms:
- Whole fresh fish
- Fresh or frozen fillets
Fish but also crustaceans
Tusk is especially rich in:
- Protein that builds and maintains every cell in the body.
- Vitamin B12, which is important for the body in producing new cells, including red blood cells. Vitamin B12 can help to prevent anaemia.
- Selenium, an important element in an enzyme that fights harmful chemical processes in the body.
More nutritional data can be found at www.nifes.no/en/prosjekt/seafood-data