Oreochromis niloticus
In India, Nile tilapia is the most dominant fish in some of the South Indian reservoirs and available throughout the year." O. niloticus" grows faster and reaches bigger sizes in a given time. The littoral areas of Kelavarappalli Reservoir are full of nests of Nile tilapia and they breed during south-west monsoon (July–September). The fish mainly feed on detritus. Zooplankton, phytoplankton, and macrophytes also were recorded occasionally from the gut of Nile tilapia. The demand is heavy, especially from local poor people, as this fish is affordable to the lowest income group in this area.