Tilapia is the second most farmed fish globally. Understanding welfare challenges in tilapia aquaculture helps consumers and advocates prioritize improvements.
Tilapia welfare receives less scientific attention than salmon welfare despite comparable production volumes. The relative stress tolerance of tilapia compared to cold-water species has led to management practices with higher stocking densities and lower water quality standards than would be acceptable for other species. Tilapia in crowded conditions show increased aggression, fin damage, and disease susceptibility that indicate welfare compromise. The welfare case for improved tilapia standards rests on the same evidence base as other fish: nociceptors, stress responses, and behavioral indicators of discomfort. The scale of tilapia production makes welfare improvements high-impact if implemented.