Over 2,100 species are illustrated in all their major forms: male, female, immature or geographical varieties. The test covers the important identification points, where the species is likely to be found on a reef and where it is found in the world, with an introduction to the habitat and how to identify fish in the wild. Important identification characteristics are also highlighted on every plate. This is the first book that enables divers and snorkellers to identify the inhabitants of coral reefs - wherever they are in the world.