Fishery Biology is primarily intended to serve as both a textbook for the graduate/ postgraduate courses and a reference book for researchers, teachers and fishery biologists. Teachers imparting advanced teaching will get contemporary view of the topics they teach in this area. It is also a much sought-after subject of specialization at PG level at Indian universities. Comprehensive treatment of fishery aspect of fish biology by Indian authors is hardly available in book form. It is one of the factors impeding the updating of syllabus.The book is intended to fill this void by bringing such topics as fish health, stress, growth, reproduction as well as management aspects of production, the economics of yield and marketing under its fold alongside fish biology topics concerning daily life of fish. Revision of earlier book, Fish Biology takes care of application value of fishery biology also, enhancing further its utility to candidates appearing in competitive as well as professional examinations/interviews for selection to teaching, research or management career in fish/fishery.