Sea Bass Welfare at Slaughter in Aquaculture

European sea bass are farmed in large quantities in Mediterranean aquaculture. Slaughter methods significantly affect the welfare of these sentient fish.

Key Facts

European sea bass (Dicentrarchus labrax) is among the most farmed fish in Southern Europe
CO2 stunning, which causes pain and distress, remains widely used in sea bass processing
Percussive stunning followed by immediate spiking is considered best practice
Sea bass show stress responses and tissue damage consistent with pain perception
EFSA has concluded that fish at slaughter have welfare needs that must be addressed

Welfare Considerations

Sea bass are sentient fish capable of nociception and stress responses. Common slaughter practices including live chilling and CO2 immersion cause prolonged distress before unconsciousness is achieved. Percussive stunning renders fish immediately insensible but requires precision and training. The aquaculture industry faces pressure from welfare certifiers and regulators to adopt higher-welfare slaughter methods. Consumer awareness of fish sentience and welfare at slaughter is growing but remains far below that for terrestrial animals.

What You Can Do

Choose sea bass from sources certified by RSPCA Assured or Global GAP higher-tier standards
Ask supermarkets about their aquaculture supplier slaughter welfare requirements
Support campaigns for mandatory humane slaughter standards in EU aquaculture regulations
Eat lower on the food chain by choosing bivalves which have lower sentience likelihood
Stay informed about fish welfare science through organisations like Fishcount