Aquaculture Welfare

Farmed Halibut Deformity and Welfare

Atlantic halibut farming faces significant welfare challenges from developmental deformities affecting a proportion of farmed fish.

Key Facts

Atlantic halibut is a highly valuable but technically challenging species to farm
Eye migration failure (pseudo-albinism) affects fish that fail to complete metamorphosis correctly
Jaw deformities affect feeding ability and can cause chronic difficulty eating
Hatchery conditions including light, temperature and nutrition affect deformity rates
Deformed fish that survive face lifetime welfare challenges from impaired feeding and movement

Welfare Considerations

Deformities in farmed halibut cause chronic welfare problems that persist throughout the fish's life. Improving hatchery conditions to reduce deformity rates and developing clear criteria for humane culling of severely deformed fish are the priority welfare interventions.

What You Can Do

Support research into halibut hatchery conditions reducing deformity prevalence
Advocate for welfare standards requiring deformity monitoring and culling criteria for farmed flatfish
Ask halibut producers about their deformity rates and management protocols