CONTENTS:- 1. Characters & Classification of Fishes 2. Origin and Evolution of Fishes 3. Swimming 4. Sound Producing Organs & weberian Ossicles 5. Electric Organs in Fishes 6. Colouration in Various Fishes 7. Endocrine Glands in Fishes 8. Breeding Behaviour and Parental Care 9. Viviparity in Fishes 10. Immunology of Fish 11. Salt Secretion
