Giant freshwater prawn is the most important and valuable fisheries item among all other fisheries commodities in Bangladesh. It plays an important role in the economy of Bangladesh. Bangladesh has unique and favorable environment for prawn and fish culture. Culture of is gaining popularity in Bangladesh because of its high market demand and suitability to stock with other commercially important fish. Polyculture of prawn with carps makes the ecological balance of the pond water, preventing the formation of massive algae blooms and at the same time increase the total production. While fish occupy mainly the water column rarely exploring the bottom, prawns live along with the substrate and efficiently utilize the benthic production. In this book, the physico-chemical and biological condition of pond, prawn and fish growth performance, survival rate, feeding efficiency and production are mentioned. It is found that the production of prawn with carps in polycuture pond at Northern Bangladesh is satisfactory under supplementary diets which are made from local fish feed ingredients.