It is written in a lucid style with the most recent advances and with theoretical discussions for easy understanding of the subject. Well labelled illustrations, diagrams, tables and figures amply support the text wherever necessary. It provides basic principles of biotechnology and fish genetics in a simple and easy language. The book is also supported with a comprehensive glossary and index in the end. This book would be an invaluable asset for the scientists, students and teachers working in the field of fishery, aquaculture and zoology.