What are the advantages of paddy fish integrated farming system?

Paddy cum fish culture helps in the economic utilization of land.  It helps to improve soil fertility & soil health. Enhanced rice yield by 5-15%, which is due to the indirect organic fertilization through the fish excreta.
Production of fish from paddy field which is the other way of additional income. Insect pests of rice like stem borers are controlled by fish feeding on them mainly by murrel and catfishes.
Cost of production will get decreased due to less usage of fertilizers and pesticides.