European sea bass is a premium aquaculture species farmed primarily in Mediterranean countries. Their welfare in intensive production systems requires attention to crowding and handling.
European sea bass welfare in aquaculture reflects the broader challenges of farming a territorial carnivorous fish in intensive conditions. Sea bass are active predators that establish territories and dominance hierarchies — behaviors that are severely disrupted by high-density farming. Fin erosion, scale loss, and bite wounds are welfare indicators reflecting crowding stress and social competition. Harvest operations involving crowding, pumping, and ice slurry slaughter without stunning cause acute suffering that pre-slaughter stunning can largely eliminate. Consumer-facing certification for sea bass is limited, and the Mediterranean aquaculture industry has been slower than northern European salmon farming to adopt welfare standards. Regulatory pressure and consumer choice are the primary levers for improvement.