Tilapia is among the most widely farmed fish globally, with production exceeding 6 million tonnes annually, yet welfare standards for tilapia during farming and slaughter remain almost entirely absent from global aquaculture governance.
Farmed tilapia welfare is compromised by the combination of high stocking densities, poor water quality in low-cost production systems, hormone-mediated sex reversal of fry, inadequate handling during harvest and transport, and slaughter without stunning. The tolerance of tilapia to adverse conditions has led to the assumption that they are low-welfare-risk species, but tolerance to stress does not mean absence of suffering. Tilapia in high-density systems show behavioral suppression, fin damage, and elevated stress hormones that indicate welfare compromise. The lack of any welfare standards for tilapia in major producing countries means that welfare improvements are entirely dependent on voluntary action by producers seeking premium market access in welfare-conscious markets, a powerful but incomplete driver of change.