Aquaculture

Salmon Sea Lice Resistance: Welfare and Industry Crisis

Overview of sea lice resistance to treatment in salmon farming and welfare implications.

Key Facts

Resistance to multiple sea lice treatment chemicals is now widespread in salmon farming
Treatment failures mean lice burdens increase, causing severe welfare harm to salmon
Cleaner fish usage has increased as a biological alternative but has its own welfare implications
New treatment modalities including laser systems and warming treatments are being developed
Lice resistance is driving investment in land-based recirculating aquaculture systems

Welfare Considerations

Sea lice resistance to chemical treatments represents a welfare and sustainability crisis for salmon farming. Treatment failures mean that salmon may carry high lice burdens causing significant pain, skin damage, and secondary infection. Biological controls including cleaner fish have welfare implications of their own. Developing effective, humane lice management approaches is one of the most urgent welfare challenges in aquaculture.

What You Can Do

Support development and adoption of welfare-compatible sea lice management alternatives
Choose salmon from farms with documented effective lice management
Advocate for investment in land-based salmon production systems as a welfare-compatible alternative