AbstractThis study aims to investigate maggot cultivation and application as an alternative feed for ornamental fish. Maggot or black soldier fly (Hermetia illucens) larva is one alternative feed that meets the requirements as a source of protein. Research Center for Ornamental Fish Cultivation (BRBIH) of the Ministry of Maritime Affairs and Fisheries has successfully developed maggot as an alternative raw material for protein sources. Maggot or black soldier fly (Hermetia illucens) larva is one alternative feed that meets the requirements as a source of protein. Besides functioning as a source of protein in fish diet, maggot can be cultivated according to the desired size. Live maggot and maggot flour as feed have been given to both ornamental fish and fish to be used for food. Thus, the use of BSF as an alternative source of protein can reduce production costs in the fishing industry without reducing its quality.