The new edition includes 2,000 species with 2,500 photographs of fishes in their natural habitat. The user-friendly guide groups species in 20 color-coded identification groups based on similar physical or behavioral characteristics. Multiple photographs for many species show variations in color and markings, life cycle phases and gender. Accompanying species accounts include common and scientific names, family, size, visual descriptions, geographical ranges and distinctive characteristics, making the visual identification of a particular species easier than ever before.