Farmed Salmon Welfare at Slaughter

Slaughter is the final and often most poorly managed welfare event in farmed salmon production. Pre-slaughter crowding and inadequate stunning cause significant and preventable suffering to millions of fish.

Key Facts

Global farmed salmon production exceeds 2.5 million tonnes annually, involving hundreds of millions of individual fish
Pre-slaughter crowding concentrates fish at extreme densities, causing severe physiological stress responses
Percussion stunning followed by gill cutting is considered best practice but is inconsistently applied
CO2 immersion - still used in some markets - causes a prolonged distress response before unconsciousness
The UK, Norway, and several other countries have moved toward mandatory electrical or percussive stunning standards

Welfare Considerations

The welfare of salmon at slaughter represents one of the largest-scale preventable suffering events in food production. Evidence that salmon experience pain and stress is now robust, yet stunning remains inconsistent across the industry. Pre-slaughter crowding alone causes measurable cortisol spikes, reduced blood oxygen, and behavioral distress lasting hours. Effective percussion or electrical stunning eliminates consciousness before any further procedure. Consumer certification pressure, regulatory requirements, and company welfare commitments are all driving improvement, but adoption remains incomplete globally.

What You Can Do

Choose salmon bearing welfare certifications that specify mandatory pre-slaughter stunning
Advocate with retailers to require stunning certification from their salmon suppliers
Support regulatory campaigns in major producing countries to mandate salmon slaughter welfare standards
Donate to fish welfare research improving the reliability and verification of stunning equipment