This book provides the latest information on trans-Himalayan Hindu Kush Region (HKR) fisheries including the Indian Himalayan Region (IHR) as well as the historical context of its sustainable development for improving livelihood and nutritional security. The book serves as an important document to provide knowledge and information about the major concerns of environmental and anthropogenic factors that have impacted the population of certain important fishes in the ecosystem and the strategies and policies required for the conservation of these important groups of fishes, viz., Mahseer, snow trout, minor carp, catfishes, etc. The chapters describe the information to the readers on potential cold water and cool water fish species suitable for large-scale farming and propagation addressing the issues of diseases, nutrigenomics, and nanobiotechnology. This book also addresses the prospects and potential of recreational fishing in India and the scope for its improvement to generate more employment and income citing the success stories and primary information from reputed anglers. Finally, the book also elucidates a comprehensive yet representative description of many challenges associated with inland coldwater- cool water fisheries and aquaculture in HKR, IHR, and its way forward.