The course manual on the anatomy and biology of finfish is an essential resource for students in fisheries science. It provides a detailed and comprehensive understanding of finfish anatomy, covering both external and internal structures, which is crucial for identifying species and understanding their functions. The manual delves into vital physiological systems, including the digestive, circulatory, respiratory, and reproductive systems, offering a thorough insight into how these systems interact to maintain fish health and functionality. It also addresses age and growth, providing methods to determine fish age and factors affecting growth rates, essential for fisheries management and conservation. By encompassing 19 chapters, the manual not only enhances theoretical knowledge but also supports practical applications, aiding in the sustainable management of fish populations. This comprehensive guide will be invaluable for academic courses, in the field of fisheries science.'