Disease outbreaks in farmed shrimp cause massive welfare events affecting billions of animals, and biosecurity approaches that prevent disease are simultaneously welfare and economic imperatives.
Shrimp disease welfare involves mass mortality events where billions of individual animals die from infectious disease over short periods - welfare events whose scale is difficult to conceptualize but whose aggregate suffering is enormous if shrimp experience pain. Prevention-focused biosecurity is simultaneously the welfare and economic priority in shrimp aquaculture. Disease-free hatchery systems, pond water biosecurity, and probiotic management reduce pathogen exposure and support immune function, reducing the frequency of mass mortality events. The welfare case for biosecurity investment parallels the conservation case for disease prevention in wild populations.