This book is highly needful for fishery department and the students reading in fisher colleges. It will also helpful to Non-Govt. organizations and to the teachers/students/scholars doing research an fish industry.From Pre-historic period fishes have been used as Protein rich diet for human beings. The popularity of fishes has been mentioned in our religious literature like the Ramayana and Mahabharata. Fresh water fishes provide valuable source of food supply to the inhabitants of the countries located in tropical regions.