Aquaculture

Atlantic Halibut Aquaculture Welfare

Atlantic halibut is an emerging aquaculture species with significant welfare challenges due to its sensitivity to handling, specific environmental requirements, and complex early life history.

Key Facts

Atlantic halibut is one of the slowest-growing commercial fish species, taking 3-5 years to reach harvest size
Halibut are highly sensitive to light levels, with larvae requiring precise photoperiod control
Wild halibut populations are critically depleted across most of their historic range
Aquaculture production is growing in Norway, Iceland, and Scotland

Welfare Considerations

Halibut are flat-bodied, benthic fish that experience significant stress when held in conventional round tanks. They require soft substrates and low light. Handling during grading causes acute stress responses and injury risk due to their large size and strength. Transport mortality rates are higher than in salmonids. Crowding at harvest causes competitive stress and fin damage. Stunning efficacy at harvest is variable and requires careful attention.

What You Can Do

Choose halibut from farms with published welfare protocols and water quality monitoring
Support research into halibut-specific stunning and slaughter methods
Encourage certification bodies to develop halibut-appropriate welfare standards
Reduce consumption of wild-caught halibut to support stock recovery