This study was carried out to evaluate growth performance of fish and prawn at different stocking densities and its impact on rice equivalent yield (REY) of rice-fish integration system. Growth performance of all species decreased with increase in stocking density from 15000 to 35000/ha. Fish and prawn yield was however, higher (p < 0.05) in refuges with 10 cm weir height plots, irrespective of stocking density while, overall yield performance was good at stocking density of 25000/ha. Moreover, as stocking density increases, carrying capacity remains largely the same and density-dependent growth occurs. Biomass at harvest was more consistent regardless of stocking density. REY was 3.88 - 4.22 t/ha at stocking density of 15000/ha and improved further (3.95 - 4,43 t/ha) when stocking density increased to 25000/ha and recorded no significant increase thereafter, when stocking density increased to 35000/ha.