Sea bream (gilthead) is a major Mediterranean aquaculture species, farmed at scale in Greece, Turkey, and Spain, with welfare standards that vary considerably across operations.
Sea bream welfare challenges parallel those of other marine cage fish. High stocking densities cause social stress, fin erosion from aggression, and competition for food resources that results in hierarchical size variation within cohorts. Parasite management using chemical baths causes acute stress during treatment. Pre-harvest crowding and transport stress can be severe. The most impactful welfare improvements include lower stocking densities, oxygenation of crowded water, pre-slaughter stunning, and selective breeding for disease resistance to reduce the need for chemical treatments. Consumer demand for welfare-certified Mediterranean fish is growing, creating market incentives for higher-welfare production.