Welfare science for farmed European sea bass (Dicentrarchus labrax), addressing stocking density, disease management, slaughter welfare, and the relationship between welfare and product quality.
European sea bass welfare in aquaculture closely parallels sea bream welfare — both are Mediterranean species farmed intensively in net pens with similar disease challenges, density management issues, and slaughter welfare problems. Sea bass are highly active, schooling fish adapted for open water movement, and their confinement in net-pen systems with stocking densities far above welfare optima creates chronic crowding stress that suppresses immune function and compromises behavioral expression. The alignment between welfare improvement and product quality is particularly strong for sea bass: fish harvested from lower-stress conditions with better pre-slaughter welfare show superior flesh firmness, color, and shelf life — providing market-based incentives for welfare investment that complement ethical arguments. Vaccination programs in European sea bass production have reduced antibiotic dependency substantially, demonstrating that welfare improvements (reduced disease burden from better husbandry and preventive medicine) can drive meaningful antibiotic stewardship improvements simultaneously.