Tilapia farming in Asia operates at vast scale with virtually no welfare oversight for individual fish.
Asian tilapia farming operates at scales that dwarf Western aquaculture, with welfare considerations almost entirely absent from regulatory frameworks. Extremely high stocking densities create chronic stress that suppresses immune function and increases disease. Oxygen depletion events kill large numbers of fish — rapid mortality at low oxygen concentrations may involve significant suffering. The scale of production — hundreds of millions of individual fish — means that even modest welfare improvements per fish would translate to enormous aggregate benefit.