Farmed Atlantic Halibut Welfare | Animal Welfare Hub

Atlantic halibut aquaculture is expanding but faces specific welfare challenges related to the species' sensitivity to light, aggressive behaviour, and cannibalism in juvenile stages.

Key Facts

Atlantic halibut grow extremely slowly — reaching market size takes 4-6 years
Juveniles are highly aggressive and cannibalistic without adequate space and feeding management
Halibut are photophobic adults that require low-light conditions for welfare
Deformities including spinal curvature and abnormal pigmentation affect 20-30% of farmed juveniles
Norway and Scotland are the primary halibut farming countries with growing production

Welfare Considerations

Atlantic halibut welfare is challenging at every production stage: larval development requires precise environmental control; juvenile stages are marked by cannibalism and aggression requiring careful feeding and density management; and adult fish need low-light conditions and adequate space that most tank systems cannot optimise. Juvenile deformity rates indicate that production conditions are not yet optimal for the species' welfare needs. The long production cycle means welfare compromises accumulate over years, making early-stage welfare investment essential.

What You Can Do

Choose halibut from certified welfare schemes where available
Ask retailers about welfare standards in their halibut supply chains
Advocate for halibut-specific welfare standards in aquaculture regulation
Support research into welfare-optimised halibut production systems
Reduce halibut consumption pending development of better welfare standards