Former Philippine agriculture chief, Manny Piñol, believes that the Philippine milkfish industry can be further improved by using 5,000 fish cages. Each fish cage can hold 80,000 milkfish fingerlings, resulting in an estimated total production yield of 100,000 metric tons. However, critics argue that fish cages can have negative environmental impacts, but advocates suggest that multi-trophic aquaculture can help minimize the impact.