Salmon Farming Welfare: The Industry Under the Microscope

Atlantic salmon farming is among the most scrutinised aquaculture sectors globally. High stocking densities, sea lice, disease, and slaughter methods are the primary welfare concerns.

Key Facts

Global Atlantic salmon aquaculture production exceeds 2.7 million tonnes annually
Norway, Scotland, Chile, and Canada are the major producing nations
Sea lice infestation causes chronic welfare harm — infestations are painful and debilitating
Mortality rates in salmon farming can reach 10-20% in some production cycles
Crowding, poor water quality, and handling cause measurable stress responses
Welfare standards vary significantly between producing nations; Norwegian farms generally have the highest standards

Welfare Considerations

Atlantic salmon welfare is a major ethical issue given the enormous scale of the industry. Sea lice infestations cause open lesions, stress, and immune suppression. Treatment methods including warm-water delicing, mechanical delousing, and chemical treatments each carry welfare costs. High stocking densities reduce water quality and increase aggression. Pre-slaughter crowding and inadequate stunning before killing cause acute suffering at enormous scale. Progress is being made: the Norwegian salmon industry has implemented welfare-based regulatory requirements, and investment in RAS technology offers potential for dramatically improved welfare conditions.

What You Can Do

Choose salmon from producers with documented welfare standards and low mortality rates
Support certification schemes that include welfare auditing for salmon farms
Ask retailers about sea lice management practices in their salmon supply chains
Advocate for mandatory pre-slaughter stunning and welfare monitoring in salmon farming regulations
Support investment in land-based RAS salmon farming as a welfare-superior alternative