Farmed prawns and shrimp are produced in massive volumes with almost no welfare regulation, despite growing evidence that decapods are sentient animals capable of suffering.
Farmed prawn welfare sits at the intersection of massive production scale and significant scientific uncertainty about the degree of sentience involved — a combination that has historically led to welfare neglect. The London School of Economics review shifted the scientific consensus toward accepting decapod sentience, making current shrimp farming practices — eyestalk ablation, extreme crowding, chemical stunning — ethically problematic at a scale involving trillions of individual animals annually. The precautionary principle is particularly compelling here: given evidence of sentience and scale of numbers, inaction on welfare is a choice with enormous potential moral costs. Reforms beginning to emerge include improved stunning protocols, elimination of eyestalk ablation in breeding stock, and reduced stocking densities. Consumer and certification pressure is the primary reform driver given the absence of regulatory frameworks.