European sea bass farmed in Mediterranean and Atlantic systems show strong welfare sensitivity to stocking density, with crowding causing measurable stress and health impacts.
Sea bass welfare is highly sensitive to stocking density — more so than many other commonly farmed fish species. Their natural behaviour as active, territorial predators in coastal environments means that crowding creates chronic conflict and stress that directly reduces welfare and health outcomes. The density levels at which welfare impacts become significant are well-documented in the scientific literature, but commercially applied densities frequently exceed recommended thresholds. Converting density guidance into enforceable regulatory requirements, combined with welfare outcome monitoring through fin damage scoring and disease incidence tracking, would create market incentives for welfare-conscious production.