Broad studies and researches on fish farming in rice field have enumerated various biological and ecological advantages; the most important being effective biological weed and pest control, reduction in pollution, and environmental sustainability. Other advantages include the increased ion contents of soil, expansion in leaf area and root network activity in rice plants, and help overcome protein deficiency in the diet of the rural poor. The other spin offs are fish excreta as manure and conversion of unproductive swamps into productive system through proper land revitalizing.