European sea bass is a highly valued farmed fish across the Mediterranean. Welfare challenges include crowding-related aggression, stressful harvesting, and the welfare implications of sea cage farming.
Sea bass aquaculture welfare improvement has become a focus of Mediterranean aquaculture research and policy. As predatory fish with territorial tendencies, sea bass suffer measurably under crowding — fin biting, wound accumulation, and growth suppression are common in high-density systems. Water quality in open sea cages is generally better than closed systems, but wild weather events can cause acute welfare crises through sudden temperature or oxygen changes. The harvesting process is a major welfare vulnerability: traditional crowding, netting, and ice-slurry killing without stunning causes prolonged conscious suffering. Electroanesthesia and percussive stunning devices are available and increasingly used by welfare-conscious producers. Consumer awareness and retailer sourcing policies in Northern European markets — which import large volumes of Mediterranean sea bass — have the potential to drive significant welfare improvements through supply chain pressure.