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.