How genetic selection in tilapia aquaculture affects fish welfare and what welfare-conscious production looks like for this globally important species.
Tilapia welfare sits at the intersection of fish sentience science, production economics, and global food security. As one of the most important aquaculture species for food security in developing countries, tilapia production trade-offs involve real human welfare considerations alongside fish welfare. Tilapia hardiness in suboptimal conditions has paradoxically created welfare risk — their ability to survive crowding and poor water quality has normalized conditions that likely cause significant stress and suffering. Best-practice tilapia production maintains adequate dissolved oxygen, appropriate stocking densities that allow social behavior expression, and clean water conditions that support immune function. The welfare science of tilapia is less developed than for salmonids, and research investment to better understand tilapia welfare needs and indicators is an important priority.