Farmed shrimp represent one of the largest-scale animal production systems in the world, with emerging evidence of pain capacity raising urgent welfare questions about crowding, disease management, and slaughter practices.
Whether farmed shrimp experience suffering in the manner of vertebrates remains scientifically contested, but the precautionary argument for improving their welfare is strong. At the scales involved, even a small probability of significant suffering translates to an enormous expected harm. High-density stocking causes aggressive interactions, loss of limbs, and impaired moulting in animals with limited space. Killing by ice water immersion — standard in the industry — causes gradual loss of function over many minutes rather than rapid insensibility. More rapid methods such as splitting are available but rarely mandated. The extraordinary number of individual animals involved makes shrimp welfare one of the highest-leverage welfare issues in food production.