Grouper are highly prized food fish farmed across Southeast Asia, often in small-scale cage systems. Their welfare as solitary predators in crowded production environments raises specific concerns.
Grouper welfare in aquaculture is complicated by their naturally solitary, territorial behaviour. Crowding in cage systems causes aggression, stress, and cannibalism - welfare indicators of severe management failure. Live grouper trade, where fish are held in restaurant tanks for months before sale, creates prolonged welfare problems including cramped conditions and disrupted feeding. Disease challenges including viral nervous necrosis cause neurological dysfunction and significant suffering. Consumer preference for live fish in some Asian markets perpetuates welfare-damaging holding practices. Developing welfare standards specific to grouper production and live holding is an important priority for this high-value species.