Aquaculture

Farmed Tilapia Welfare in Intensive Systems

Tilapia is one of the world's most farmed fish species, and intensive production raises welfare concerns about stocking density, water quality, and handling stress.

Key Facts

Tilapia is the second most farmed fish globally, with over 6 million tonnes produced annually
Intensive systems can stock tilapia at densities far exceeding recommended levels
Low dissolved oxygen and high ammonia from crowding cause chronic respiratory stress
Tilapia show stress responses including darkening, surfacing, and reduced feeding
Some tilapia producers in Southeast Asia use hormone-treated feeds that raise welfare and health concerns

Welfare Considerations

Tilapia welfare in intensive systems is compromised by conditions that prioritise production efficiency over fish wellbeing. Chronic hypoxia and ammonia stress cause physiological suffering that is invisible to the consumer but measurable in fish physiology. The scale of production - billions of fish annually - makes welfare improvements in even a small proportion of the industry significant in absolute terms.

What You Can Do

Choose tilapia from certified sustainable and welfare-assessed sources
Ask retailers about their tilapia supply chain welfare standards
Support development of welfare standards for tilapia production
Engage with certification bodies about including tilapia welfare criteria
Reduce consumption of uncertified intensive tilapia where alternative protein is available