The Nf (natural food as supplementary feed) showed a considerable SGR-L, SGR-W and ADG in RT and NT seed rearing. It has shown, the fish in Nf has utilized more natural food, as they have no other food. The nutritionally complete natural food may have contributed to the high growth of fish in Nf. Coche (1982) has explained that in some cases, natural food (plankton, aufwuchs or benthos) may be sufficient and no supplementary feeding is required. Accordingly the extensive seed rearing of cages could be recommended. The community who involved in cage culture practices should clean the mesh of the net cages to exchange water for entry of natural foods. The Researchers and Extension staff could select the reservoirs with plenty of natural foods to promote cage culture extensively.