European sea bass is an increasingly farmed Mediterranean species with specific welfare needs relating to social behaviour, water quality, and stocking density that are the subject of growing research.
Sea bass welfare in aquaculture is affected by the same fundamental stressors as other farmed fish: inadequate water quality, inappropriate stocking densities, handling stress during grading and transport, and inhumane slaughter methods. The paradoxical relationship between density and aggression — where intermediate densities may maximise conflict — complicates density regulation. Sea bass predatory nature means that size-grading to prevent cannibalism is necessary but itself constitutes a welfare stressor. The cognitive sophistication of sea bass, increasingly recognised through research, suggests their welfare needs are more complex than simpler fish species. Welfare standards for Mediterranean aquaculture species including sea bass are less developed than for Atlantic salmon and rainbow trout.