Aquaculture

Tiger Grouper Welfare in Tropical Mariculture

Welfare considerations for tiger grouper farmed in floating cage systems across Southeast Asia.

Key Facts

Tiger grouper is a high-value reef fish widely farmed across Southeast Asia
They are solitary and territorial in the wild — cage crowding causes stress
Viral nervous necrosis (VNN) is a major disease welfare concern in hatcheries
Capture of wild juveniles for grow-out continues in some regions

Welfare Considerations

Tiger grouper welfare in cage aquaculture is affected by crowding stress, disease burden, and in some regions the continued use of wild-caught juveniles. Hatchery production is growing but juvenile welfare in overcrowded nursery tanks is a concern. Welfare-informed production uses hatchery stock, manages stocking densities to reduce aggression, and monitors for VNN with rapid response protocols.

What You Can Do

Choose grouper from certified producers using hatchery rather than wild-caught stock
Support research into grouper welfare in intensive cage systems
Advocate for prohibition of wild juvenile collection for grouper aquaculture grow-out