Tilapia is the most widely farmed fish globally. Understanding welfare challenges in intensive production systems helps drive improvement for billions of fish.
Tilapia welfare is a large-scale issue that receives limited attention compared to salmon or sea bass, despite the far greater number of animals involved. The adaptability of tilapia to crowded, low-quality water does not mean they are welfare-indifferent — research confirms stress responses, aggressive behaviour, and immune effects from intensive conditions. The scale of global tilapia production means even modest welfare improvements would benefit enormous numbers of sentient animals. Hormonal sex-reversal in fingerling production raises ethical questions that have not been fully resolved. The fragmented, predominantly small-scale nature of tilapia production across many countries makes welfare certification and enforcement particularly challenging.