Among the economically important bivalves, the slipper oyster (Crassostrea iredalei) and green mussel (Perna viridis) are predominantly being farmed in the philippines. Oyster and mussel farms in the Western Visayas region have increased because of the need for supplementary sources of incom brought about by the dwinding catch of small-scale fishermen.socio-demographic and costs and returns data were gathered from 175 oyter and mussel farmers using a combination of rapid rural appraisal techniques and a pre-tested questionnaire. Oyster and mussel farms, less than 1000 m ², were located among fish capture devices in the rivers and bays. The oyster and mussle farmers belong to the marginalized sector of society with about 30% of total household income derived from oyster and musselfarming. Problems encountered by the oyster and mussel farmer included poaching, mortality due to siltation or sedimentation and pond effluents, no spat, lack of financing, and lack of buyers. This study recommends that oyster and mussel farmers from cooperatives to effectively market their produce and avail of financing, and research on the non-occurrence of spat.