Through combining thecultivation of milkfish with Gracilaia and oyster, we have successfullyestablished integrated multi-trophic aquaculture (IMTA) system. Furthermore,photosynthesis bacteria were used to improve the water quality . After 17days of rearing, the growth in weight (total length) of milkfish increase from34.06 g to 102.95 g (16.37.02 cm to 20.35 cm) . Finally, 1657.2 kg of milkfish washarvested. Additionlly, the feed for green aquaculture was developed, and feedconversion ratio (FCR) of the milkfish could reach to 1.96.