The final stages of salmon production — crowding, fasting, and slaughter — involve some of the greatest welfare risks in aquaculture. Humane slaughter standards are advancing but inconsistently applied.
Salmon pre-slaughter welfare has improved substantially in leading production countries as welfare science has progressed and regulatory frameworks have caught up with evidence. The key insight is that the transition from live animal to product involves a period of extreme stress — crowding, handling, transport, lairage, and finally slaughter — each of which compounds the welfare burden if not managed carefully. Electrical stunning has emerged as the most practical and welfare-effective approach for salmon: it is fast, effective at the scale of commercial production, and can be integrated into existing harvest lines without prohibitive modification. The economic argument reinforces the welfare case: stressed fish have elevated cortisol that damages flesh quality, and well-stunned, low-stress fish produce consistently higher-quality product. Consumer demand for welfare-certified seafood and retailer commitments to humane slaughter standards in supply chains are the primary market drivers for broader adoption of improved pre-slaughter practices.