Aquaculture Cod and Atlantic Halibut Welfare

Atlantic cod and halibut aquaculture are expanding in Northern Europe and North America, with welfare challenges including crowding stress, deformities, and pre-slaughter handling.

Key Facts

Atlantic cod aquaculture has grown significantly in Norway and Iceland as wild stocks collapsed
Crowding during grading and transport causes acute stress in cod measurable via cortisol response
Skeletal deformities occur at significant rates in farmed cod due to genetic and nutritional factors
Atlantic halibut farming is growing but welfare standards lag behind salmon aquaculture
Halibut are demersal fish adapted to flat substrates, making standard tank rearing suboptimal
Pre-slaughter crowding stress in cod affects flesh quality as well as welfare

Welfare Considerations

As new species enter commercial aquaculture, welfare standards often lag behind production expansion. Cod and halibut farming have grown rapidly in response to wild fish stock collapses, but the welfare science for these species is less developed than for salmon. Skeletal deformities in farmed cod - affecting muscle attachment and mobility - represent a significant welfare and production problem linked to nutrition and genetics. Developing species-appropriate welfare standards before intensive production scales is preferable to retrofit after welfare harms emerge.

What You Can Do

Choose certified aquaculture products with strong welfare monitoring
Support research into cod and halibut welfare indicators and husbandry refinements
Donate to organizations working on expanding aquaculture welfare science to new species
Advocate for welfare standards to be required before new aquaculture species are commercially licensed