Animal Welfare Hub

Evidence-based resources for animal welfare

aquaculture

Mussel Welfare in Aquaculture: What We Know

Mussels are farmed at massive scale globally. While their sentience is debated, this guide explores what is known about their welfare in aquaculture.

Key Facts

Mussels are bivalve molluscs with limited but debated capacity for nociception
They are suspension feeders relying on clean, oxygenated water
Aquaculture methods include longline, pole, and raft culture
Husbandry stressors include emersion, temperature extremes, and density
Research into bivalve sentience remains ongoing and inconclusive
Applying a precautionary welfare approach has minimal production costs

Welfare Considerations and Management

Current evidence suggests mussels have basic sensory systems but lack the neural complexity for conscious suffering as understood in vertebrates. However, a precautionary approach to their welfare is recommended. Key welfare considerations include water quality, appropriate temperature ranges, minimal handling stress, and humane harvesting methods.

What You Can Do

Maintain optimal water quality and temperature ranges for production
Minimise unnecessary handling and mechanical stress during harvest
Monitor for disease and apply treatments promptly when needed
Apply precautionary welfare principles given ongoing scientific uncertainty