Tilapia is one of the most farmed fish globally, particularly in tropical developing countries. Welfare standards in tilapia aquaculture lag far behind those developing for salmonids.
Tilapia aquaculture represents one of the largest welfare gaps in the global food system. Billions of tilapia are produced annually in systems with no welfare standards, no pre-slaughter stunning, and limited regulatory oversight. While tilapia are more tolerant of adverse conditions than salmonids, tolerance is not the same as indifference — they show stress responses, pain avoidance behaviour, and evidence of nociceptive capacity. The low economic value per fish and the dominance of production in countries with limited regulatory capacity create structural barriers to welfare improvement. Consumer demand from high-income countries for certified sustainable tilapia could drive improvement if welfare criteria were included alongside environmental standards.