European sea bass (Dicentrarchus labrax) is one of the most valuable farmed fish in Europe. Improving welfare in this premium product segment is both ethical and commercially important.
Sea bass welfare challenges mirror those of other Mediterranean farmed fish: crowding stress, handling during grading and treatment, and inadequate slaughter practices. Sea bass show pronounced stress responses including cortisol elevation and behavioural suppression under high-density conditions. Their predatory nature means dominant individuals in crowded conditions can cause significant injury to subordinates. Vaccination by injection — standard for disease prevention — causes acute handling stress and must be managed carefully. Slaughter welfare is the most acute concern: rapid chilling without prior stunning causes prolonged conscious suffering. Electrical stunning or percussion before ice immersion is achievable for sea bass and dramatically reduces time to unconsciousness. Premium market positioning makes sea bass farms particularly well-placed economically to absorb welfare improvement costs.