Growing evidence of salmon learning, memory and complex neural processing raises welfare questions about the cognitive impacts of intensive farming conditions on farmed Atlantic salmon.
Salmon brain welfare connects emerging neuroscience with welfare ethics. If salmon experience cognition, learning and emotional states analogous to other vertebrates, then the conditions of intensive farming - chronic crowding, repeated stressful handling, competition for resources - create sustained negative emotional states, not just physiological stress. This reframes the welfare conversation from whether salmon suffer (increasingly answered yes) to how intensively they suffer and how we can minimise it. Welfare improvements that reduce chronic stress - lower densities, more consistent environments, reduced handling frequency, enriched space - benefit salmon welfare at a neural and experiential level beyond just reducing cortisol.