Salmon aquaculture raises significant welfare concerns through crowded conditions, parasites, disease, and handling practices affecting hundreds of millions of fish globally.
Farmed salmon experience multiple simultaneous welfare harms: crowding that prevents normal swimming and social behavior, sea lice that feed on their skin and blood causing lesions and stress, handling during treatments that causes acute distress, and net pen conditions that expose them to storms and predator attacks. The scale - hundreds of millions of fish - makes salmon farming one of the most significant welfare challenges in food production. Consumer and regulatory pressure is beginning to drive welfare improvements.