The present book “Aquaculture and Fisheries” is divided into two volumes. The volume – 1 is subdivided into three parts i.e. Part I: Fish Biology, Part II: Fish Breeding, Genetics & Biotechnology and Part III: Fish Disease and Immunology. The volume – 2 of the book is also subdivided into three parts i.e. Part IV: Aquatic Biology, Part V: Capture Fisheries and Part VI: Aquaculture. This book clearly demonstrate the diversity of information necessary for success in aquaculture and fisheries. This publication is compendium of knowledge about aquaculture and fisheries. This book is intended as a general text cum reference book for courses in aquaculture, fisheries and zoology