Freshwater aquaculture refers to raising and breeding aquatic animals (fish, shrimp, crab, shellfish, etc.) and plants for economic purposes by the use of ponds, reservoirs, lakes, rivers, and other inland waterways (including brackish water), which play an important role in the aquaculture industry.Freshwater aquaculture  the captive propagation of fresh water organisms. Carp species are most commonly cultured, but tilapias, catfishes, and a few other species are produced in large quantities. Ponds are the most common systems for aquaculture, but raceways  and other flowing water systems, cages, and net pens are also important.