Farmed Salmon Pre-Slaughter Welfare

The pre-slaughter handling and stunning of farmed salmon is a critical welfare point, with poor practices causing prolonged consciousness during killing in many commercial operations.

Key Facts

Salmon must be rendered unconscious before slaughter to minimise welfare harm under EU regulations
Percussion stunning using a blow to the head is effective but requires skill and consistency
Electrical water bath stunning can be effective but is often applied at insufficient power
CO2 bath exposure, formerly common, is considered inhumane and causes stress before unconsciousness
Spike and immediate gill cut (ikejime) is used in premium salmon production and ensures rapid death
Welfare monitoring during slaughter including reflex testing is required under EU law

Welfare Considerations

Pre-slaughter welfare in salmon farming is an area where standards vary enormously between operations and regulatory frameworks. The differences between humane and inhumane slaughter methods are significant - a correctly percussion-stunned fish loses consciousness instantly, while a CO2-exposed fish takes minutes to lose consciousness in obvious distress. Consumer and certification pressure has driven improvement in higher-end markets, but mainstream commercial salmon slaughter practices remain inconsistent. Supporting welfare certification schemes that specify humane slaughter methods is a direct welfare intervention.

What You Can Do

Choose salmon certified under schemes specifying effective pre-slaughter stunning requirements
Support retailers who have salmon welfare commitments including humane slaughter standards
Advocate for uniform slaughter welfare standards to be applied to all commercially farmed fish
Support research into automated percussion stunning systems that enable consistent welfare outcomes