Synopsis Fishes are the most widely distributed vertebrates in the vast water areas of the earth. The present title deals with the broad principles of ichthyology including morphology, anatomy, physiology and development of fishes. The text is the coverage, commensurate, concise and comprehensive presentation. It is hoped that this publication will adequately meet the long felt need of the students for a simple and upto date book. The method of presentation is also very simple so as to impact to the students a clear and vivid understanding. Profusely illustrated the authoritative information contained in this text will prove of utmost use to the students, teachers and researchers.