Early Mortality Syndrome devastated Asian shrimp farming — the disease outbreak and industry response revealed significant welfare gaps in intensive shrimp production.
EMS provides a case study in how intensive aquaculture practices create welfare vulnerabilities at enormous scale. The conditions that maximize stocking density — reduced water exchange, minimal space, high organic load — create the disease environment in which EMS thrives. The welfare impact of mass EMS mortality is significant: if shrimp experience pain (the scientific evidence suggests they are capable of pain responses), then billions of animals experiencing hepatopancreatic tissue destruction represent a welfare catastrophe alongside the production loss. Industry response to EMS through improved biosecurity and density reduction demonstrates that welfare-aligned practices are also commercially rational — the most intensive systems are not the most resilient. This alignment of welfare and disease resilience provides a practical argument for welfare reform in shrimp farming.