Geographical distribution
Eastern Atlantic, from England to norther Norway, Iceland and eastern Greenland. Elsewhere, from Newfoundland to north-western Greenland and in the northern part of the Pacific (Sagami Bay northwar, the Sea of Japan, the Okhotsk Sea, the Bering Sea, the Pacific coast of North America to off Mexico.

Greeland halibut - Geographical distribution

Habitat and biology
An arctic species foundat 200-2000 m, (mostly preferd depths of 500-1000 m)  but often caught pelagically and supposed to swim on the ventral edge and not on the blind side.

It is an active, mid-water hunter, feeds on prawns and fishes (cod, Artic cod, eelpouts, capelin and redfish), as well as squids.

Generally, it spawns in 700-1500 m in spring-summer (April-July at 3-5° C), and the eggs, larvae, and postlarvae are all found free-floating in deep water.  Metamorphosis is completed at a length of 6-8.5 cm; the young may be found then in the shallower regions inhabited by this flatfish.

Size
Maximum length about 120 cm weight about 45 kg; usually 80-100 cm and 11-25 kg.

Fisheries
Mainly caught on long lines. The most common fishing techniques are "demersal bottom trawling" and "groundfish longlining". Its flesh is inferior to that of the halibut. Marketed fresh and frozen.  Utilized dried/salted and frozen; can be steamed and fried.

Source: FAO