Farmed shrimp represent billions of individuals whose welfare is increasingly studied, with evidence suggesting sentience that demands consideration of stocking density, handling, and slaughter practices.
Shrimp welfare sits at an important frontier of animal welfare science and policy. The evidence that decapod crustaceans have functional nociceptors, show avoidance learning, engage in wound guarding, and display stress responses consistent with pain-like states is now sufficiently strong that welfare consideration is scientifically justified and increasingly legally mandated. In intensive shrimp farming, extremely high stocking densities prevent normal movement and social behaviour, while handling during harvest causes acute physiological stress. Ice slaughter — the standard commercial method — is of uncertain humaneness; the speed and nature of crustacean cold tolerance means the timeline to insensibility is unclear. Electrical stunning methods adapted for shrimp are technically feasible and may represent a more humane alternative. Disease pressure in intensive ponds leads to mass mortality events involving potentially large numbers of suffering individuals. As awareness of shrimp sentience grows, consumer and industry pressure for improved welfare standards in shrimp production is expected to increase significantly.