This book titled Evolution and Expression of Hormones in Fish deals with the said subject in its totality. Research on the molecular aspects of fish reproduction has progressed swiftly over the past few years. In fish culture the use of hormones is mainly limited to the field of reproduction, and more precisely to induce or synchronize ovulation and stimulate spermination. This book reveals novel variants of reproductive hormones and their receptors, and has shed new light on the mechanisms through which many of these genes can be activated. The book will not only meet the requirement of students but will also be useful as a guideline to the teachers and researchers.