Tilapia are among the most widely farmed fish globally, particularly in tropical and subtropical regions. Their welfare in intensive aquaculture is shaped by stocking density, water quality, and social dynamics.
Intensive tilapia production frequently uses stocking densities that prevent normal social behavior and territorial establishment. Male aggression under these conditions causes chronic stress and physical injuries. Monosex male production using hormonal sex reversal addresses aggression but raises ethical questions about intervention in development. Water quality management is the single most impactful welfare intervention in tilapia farming; adequate dissolved oxygen and ammonia control dramatically reduce mortality and stress. Providing structural complexity in tanks, even simple pipe sections or plant material, reduces aggression and improves individual welfare outcomes.