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Research efforts on halibut have been limited. 

Local fishermen who have helped with tagging studies have contributed greatly. The Institute of Marine Research also conducted some tagging experiments and data collection during routine surveys. Tagging studies indicate that halibut of all sizes are distributed locally.  However, there have been examples of halibut which were tagged in the North and then migrated south.

This is consistent with results from earlier tagging studies, and suggests that migration to areas south of 62 ° N increases with population growth in the north. Whether migrating halibut also spawn in these new areas is less clear.

Facts about Atlantic halibut

Latin name: Hippoglossus hippoglossus
Family: Pleuronectidae (flounder family)
Maximum size: +Females: over 3.5 m / 300 kg; Males: up to 50 kg
Lifespan: Up to 60 years. Females can live significantly longer than males
Living area: Young halibut live along the coast in relatively shallow water. Older, larger halibut also occur in the open ocean.
Distribution: Occur on both sides of the North Atlantic; offshore Newfoundland and Labrador; from Cape Cod (USA) to the northwest coast of Greenland; off East Greenland and Iceland; from Svalbard to Novaya Zemlya; and southward towards Biscay.
Spawning area: Takes place at 300–700 m depth; in deep pits on the fishing banks along the coast and fjord areas.
Spawning season: From December to May.
Diet: A predatory species that eats bottom fish such as tusk, cod, sculpin, and haddock, and pelagic species such as herring, capelin, and squid.