This expanded and updated edition of a valuable manual for marine aquarium hobbyists provides the latest scientific discoveries and aquarium techniques for keeping and propagating living corals. The coral reef, both in the ocean and in a marine aquarium, is a symbiotic system of corals and beneficial algae in a community with other marine life forms. The author also discusses sponges, echinoderms, mollusks, crustaceans, and fishes, and advises on controlling and eliminating diseases and parasites in a marine aquarium. Filled with instructive color photos.