Environmental Enrichment for Farmed Salmon

Providing environmental complexity in salmon farms reduces stress and improves welfare in intensively farmed fish.

Key Facts

Light, current, and structural enrichment can all reduce stereotypic swimming patterns in salmon
Salmon in monotonous pen environments show higher cortisol and abnormal swimming patterns
Dim lighting at the pen surface encourages natural depth-seeking behaviour
Current generators that create water flow give salmon opportunities to exercise against current
Environmental enrichment reduces aggressive interactions in farmed salmon populations

Welfare Considerations

Salmon farm enrichment is an emerging area of aquaculture welfare science. Salmon pens provide a monotonous environment relative to the complex rivers and oceans where wild salmon live. Evidence shows that introducing environmental complexity — varied light regimes, current simulation, structural elements — reduces stress and abnormal behaviour. The welfare benefit of enrichment must be balanced against practical feasibility at commercial scale, but early evidence suggests meaningful improvement is achievable with modest investment.

What You Can Do

Choose certified salmon from producers investing in welfare enrichment research
Support aquaculture research into practical enrichment for farmed salmon
Advocate for welfare standards requiring environmental complexity in salmon aquaculture
Learn about the research on salmon enrichment and its welfare outcomes
Reduce salmon consumption or choose enrichment-certified alternatives