The Atlantic halibut is among the largest bony fish in the world and a member of the Pleuronectidae family of right-eyed ﬂounder. The flounder has a unique type of maturation from larvae to adult stage, in which one eye migrates to the opposite side of the head.
The Atlantic halibut is a highly prized table fish, with white, tender flesh, but it is such a deep-dwelling fish that it is seldom deliberately pursued by anglers. It may be caught incidentally by anglers fishing for other deep-ocean dwellers. It has historically been an extremely important market species, but it has been greatly overﬁshed by commercial interests, who primarily catch it by bottom longlining.