Nile tilapia are the most widely farmed fish globally - their welfare in intensive pond and tank systems is affected by crowding, aggression and water quality management.
Nile tilapia welfare receives less attention than salmon or trout despite being the most numerous farmed fish. Their higher tolerance of crowding compared to salmonids does not eliminate welfare concerns at the extreme densities used in intensive pond systems. Aggression management through all-male production using sex reversal involves hormonal manipulation with its own welfare questions. Water quality management in intensive ponds requires careful monitoring to prevent oxygen depletion events. Consumer awareness of tilapia welfare is low - most purchasing decisions are made purely on price and convenience without welfare consideration. Developing welfare standards and certification for tilapia production would address this gap.