Atlantic halibut aquaculture is expanding rapidly but the species' complex biology and sensitivity create specific welfare challenges in intensive rearing systems.
Atlantic halibut welfare in aquaculture presents distinctive challenges from this species' size, sensitivity, and complex development. Juveniles that fail to properly complete metamorphosis develop into non-viable individuals that experience prolonged physiological stress. Cannibalism in poorly graded groups causes traumatic injuries and death for smaller individuals. Skin and scale damage from handling impairs the protective function of the integument and causes chronic injury. Halibut welfare science is less developed than for salmon, meaning that industry expansion is outpacing the welfare knowledge needed to manage these animals appropriately.