Fish migration: Patagonian toothfish found off Greenland.

A large (1.80 metres in length and weighing 70 kg) Patagonian toothfish (Dissostichtus eleginoides Smitt, 1898) has been caught in the northwest Atlantic, representing the first Northern Hemisphere record of the diverse, abundant and mainly Antarctic suborder Notothenioidei. This extraordinary catch indicates that large, cold-temperate fishes may occasionally migrate from sub-Antarctic to sub-Arctic waters by using deep, cold water, supporting a widely accepted but unproven proposal that the anti-tropical distribution patterns of many marine biota could be explained by transequatorial migration. [ABSTRACT FROM AUTHOR]