The Red Sea, East Africa, and the islands in the Indian Ocean, especially the Maldives, are the most dived marine areas with tropical coral reefs. The abundance of colorful coral fish particularly captivates both divers and snorkelers. However, in most cases, the correct species names are hardly known, and information about behavior and lifestyle is rarely found. This provides a good reason to present the most common, attractive, and interesting fish, totaling over 390 species, in this color atlas in detail through text and images. For each species, all necessary information is provided, such as identifying features, potential confusions, habitat, lifestyle, and biology, as well as tips for aquarium keeping. An essential fish guide for every diver, snorkeler, and nature enthusiast. The most common and beautiful coral fish of the Indo-Pacific.