Fisheries science is the craft of overseeing and understanding fishes. It incorporates freshwater biology, limnology, marine biology, conservation, ecology, oceanography, economics, and management. Also, it is the kind of industry which joins getting and offering of fishes for nourishment, pharmaceutical and research. Further than marine water fisheries there are fresh water fisheries as well. There are two sorts of waters the new and the bitter. The fresh water bases are water system, repositories, lakes, tanks, lakes. The estuaries, ponds and mangrove swamps establish the salty kind of water. Fisheries science plans and maintain the quality of fish and fishery items.