Synopsis Aquarium-fish keeping is more popular today than it ever was before. At present, while it still enjoys its indoor value as an absorbing pastime or just a personal hobby, it has developed beyond a long period of infancy into an organised industry which supports education, research and trade. No success can be achieved in aquarium keeping unless the aquarium is well planned and properly stocked. This requires a certain degree of scientific approach with regard to setting of the aquarium, selection of fishes and plants and their maintenance. Aquarium fishes and plants know no geographical boundaries of the countries. Extensive export and import activities exist today following development of organized sector in culture of ornamental fishes. People take interest in novelties, notwithstanding the fact that the fish of their liking is indigenous or exotic. The book is, however, not intended to be an encyclopaedia or even a compendium. It is written to serve as a digest at best, to guide on scientific lines an aquarist, a hobbyist, a novice, an amateur or a professional in aquarium keeping.