It is a rare opportunity for a student to write Fore ward to his own teacher. In a broad sense, this book will be very suitable for the students who have problems in understanding due to unfortunate standard of English. Considering this in mind, the author have prepared this Developmental Zoology, Ecology, Animal Physiology and Evolution book with easy standard of English for better understanding of the students. The author particularly expresses heartfelt thanks to the Management of St. Judes College, Thoothoor, for the blessings, splendid encouragement and valuable suggestions.

I am working as an Assistant Professor in Fisheries Department of St. Jude's College, Thoothoor, Kanyakumari District, Tamil Nadu, India. I am more interested to working in Ichthyology.