Groupers are prized food fish farmed intensively in Asia. Their territorial nature, sensitivity to crowding, and live transport practices create specific welfare challenges requiring targeted management.
Grouper welfare in aquaculture is shaped by their naturally solitary and territorial behavior, which makes crowded tank conditions particularly stressful. Unlike more gregarious fish, groupers in intensive systems cannot establish normal territorial boundaries and spend energy on constant agonistic interactions. The live reef fish trade imposes additional welfare burdens through extended transport and handling. Disease in crowded grouper tanks spreads rapidly; VNN causes neurological symptoms including loss of balance and spiral swimming that are distressing for affected fish. Welfare improvements require lower stocking densities, improved water quality management, disease-resistant broodstock development, and more humane live transport protocols. Consumer preference for live fish in some markets is a major driver of welfare-compromising practices.