Aquaculture Salmon Welfare: New Advances and Challenges

Salmon farming has grown dramatically worldwide, and new welfare science is transforming practices around stunning, crowding, sea lice treatment, and slaughter.

Key Facts

Global farmed salmon production exceeds 2.7 million tonnes annually, making it one of the world's most important aquaculture species
Sea lice infestations cause chronic pain and immune stress in farmed salmon and are a major ongoing welfare challenge
New research confirms salmon have pain receptors and behavioral pain responses comparable to other vertebrates
Controlled atmosphere stunning using CO2 is now recognized as inducing aversive stress; electrical and percussive stunning are preferred
Recirculating aquaculture systems (RAS) allow better control of stocking density, disease, and water quality for welfare

Welfare Considerations

Farmed salmon experience welfare challenges throughout their lifecycle including crowding stress, sea lice infestations, handling during grading and transfers, and slaughter method variation. The welfare science for salmon has advanced considerably, with growing recognition that these fish are sentient and capable of suffering. Industry leaders and regulators are increasingly adopting welfare indicators, humane slaughter standards, and lice management protocols that minimize harm.

What You Can Do

Choose salmon products certified under standards requiring humane slaughter and lice monitoring
Support advocacy organizations pushing for mandatory welfare standards in salmon farming
Ask retailers about their salmon supplier welfare requirements
Stay informed about aquaculture welfare developments through organizations like the Fish Welfare Initiative