Tilapia is one of the world's most widely farmed fish species, with production concentrated in tropical countries and welfare standards highly variable across production systems.
Tilapia welfare in intensive systems is affected by stocking density, water quality, diet quality, and slaughter method. While tilapia are physiologically robust, this does not mean they are insensitive to pain or stress - evidence for fish sentience applies to tilapia as to other vertebrates. The most common slaughter method - ice slurry immersion - results in a slow, conscious death and should be replaced by percussive stunning or other rapid killing methods. Certification schemes provide a lever for improvement, but consumer and regulatory pressure is needed to close existing welfare gaps in what remains a largely unregulated sector.