Fish is a source of animal protein and of income for fish far69 mere. Fish pond must get an adequate supply of water and the depth of water should be enough so that the fish may not be affected by rise and fall of temperature. The sides of the pond should have a slope to minimize the erosion by water and facilitate movement of the fish to the deeper and in summer. Waterlogged areas are best suited for fish farming. Fish farms cannot flourish in the absence of aquatic plants. They provide protection against the aim and from the energy but their abundance is harmful. The dead aquatic plants fall to the bottom and pollute the water after. decomposition. The most suitable plants for fish farms are the Hydrilla, Potammogeton app. and Vallesnaria spp. Fish seed can be obtained from the local fishing department. These are collected from the natural spawning areas stocked temporarily and are allowed to grow from.4"-6" and then are transported and delivered to the farms for stocking. In Punjab fishes like Labeo rohita, Catla catla and Cirrhina mrrigala are cultured. Fertilization of pond is supposed to increase productivity by increasing the nutrient such as bacteria and phytoplankton. This in turn provides more food for higher organisms. Inorganic fertilizers are proved better than organic ones. They are cleaner and more easily applied. Fish production can also be increased by providing rice bran, wheat bran, oil cake, kitchen and poultry refuse, slaughter house and cow dung refuse. Diseases of the fishes include Dermatomycosi and louse infection caused by fungus and parasite respectively.