Ornamental fish keeping is not only a hobby it involves a series of activities such as construction and designing of aquarium, ponds breeding and study of diversity among aquarium fishes, temperature control, maintenance of dissolved oxygen, importance of filters which have been discussed. This book also points out feed formulation schedule and culture of live food micro-organism. Aquarium/Ornamental fisheries are a convenient tool of environmental and aquatic biology, education and self-employment. During last four decades there has been considerable growth and diversification in international trade in ornamental fishes. After knowing the details of Aquarium management/ornamental fisheries, one can fetch the world market of ornamental fisheries through their (fishes) cultivation and breeding. This trade can be publicised through aquarium shows. This book will be beneficial for fish hobbyists, naturalists, Scientist and unemployed youth.