Aquaculture Welfare

Farmed Salmon Lice Treatment Welfare 2026

Sea lice treatments in salmon farming cause significant welfare costs to treated fish - 2026 developments focus on reducing treatment frequency through prevention.

Key Facts

Hydrogen peroxide treatments cause stress and can damage gill tissue
Thermolicer and hydrolicer mechanical treatments cause physical trauma
Biological control using wrasse is growing but raises welfare concerns for cleaner fish
Vaccine development against sea lice remains a major research priority
Synchronised fallowing between harvest cycles breaks lice reproductive cycles

Welfare Considerations

Every sea lice treatment is a welfare event for salmon. Prevention - through biological control, selective genetics, and farm management - reduces treatment frequency and directly improves salmon welfare at scale.

What You Can Do

Choose salmon from farms with low treatment histories and biological control
Support research funding for sea lice vaccines
Advocate for mandatory welfare reporting of lice treatment events