Farmed Shrimp Disease Welfare | Animal Welfare Hub

Disease outbreaks in farmed shrimp cause mass mortality and significant welfare concern; biosecurity and selective breeding are central prevention strategies.

Key Facts

White Spot Syndrome Virus (WSSV) and Early Mortality Syndrome (EMS/AHPND) are the most destructive shrimp diseases.
Disease outbreaks cause losses of billions of dollars annually and kill hundreds of billions of shrimp.
High stocking densities and poor water quality are primary predisposing factors for disease outbreaks.
Biosecure recirculating aquaculture systems (RAS) significantly reduce disease risk but have high capital costs.
Selective breeding for disease resistance has produced some improvements, particularly for WSSV resistance.

Welfare Considerations

Mass mortality events in shrimp aquaculture represent welfare harm on an enormous scale. Whether the suffering involved in disease-related death constitutes significant welfare harm depends on one's assessment of shrimp sentience — a matter of ongoing scientific debate. Applying the precautionary principle given uncertainty about crustacean nociception, reducing the frequency and scale of disease-related mass mortality events has welfare relevance. Better biosecurity, appropriate stocking densities, and improved water quality management benefit animal welfare while also addressing economic losses. Consumer preference for responsibly certified shrimp creates market incentives for better practices.

What You Can Do

Choose shrimp certified by ASC or other schemes with biosecurity and welfare standards.
Support research into shrimp sentience and welfare to inform more evidence-based standards.
Advocate for lower stocking densities in shrimp aquaculture as both a disease prevention and welfare measure.
Reduce shrimp consumption given the significant welfare uncertainties and disease-related suffering at scale.