Giant groupers are farmed and traded live in Southeast Asia, with welfare challenges specific to this large, slow-growing, solitary predator in intensive mariculture systems.
Giant grouper welfare in mariculture is significantly compromised by the mismatch between the species naturally solitary, territorial nature and the high-density cage conditions of commercial production. Chronic aggression and social stress cause fin damage, skin lesions, and immune compromise in individually subordinate fish. The requirement for frequent size grading to prevent cannibalism causes repeated handling stress. Live transport for luxury markets extends welfare compromise beyond the farm. Developing species-specific welfare standards that acknowledge giant grouper behavioural needs would represent a significant improvement over current largely unregulated production practices.