CONTENTS: 1. Introduction: Facts and Structure of Fishes; 2. Agnatha-Ostracoderms and Cyclostomes; 3. General Characters, Classification,  Evolution  &  Phylogeny  of  Fishes; 4. Placoderms; 5. Elasmobranchs; 6. Holocephali; 7. Dipnoi; 8. Telesotomi (Perfect-Mouthed  Fishes ); 9. Locomotion and Migration; 10. Fins; 11. Integumentary System (The Skin, Scales and Colouration); 12. Fish Osteology; 13. Digestive System; 14. Gill Respiration; 15. Accessory Respiratory Organs; 16. Air Bladder and Weberian Apparatus; 17. Blood Vascular System; 18. Nervous System; 19. Excretion and Osmoregulation; 20. Reproduction; 21. Development; 22. Accoustico-Lateralis System; 23. Endocrine Glands; 24. Specialised Organs in Fishes; 25. Adaptations in Fishes; 26. Fishing Methods in India; 27. Physico- Chemical & Biological Factors in Fish Culture; 28. Construction and Maintenance of Fish Farm; 29. Fish Culture in Fresh Water; 30. Composite Fish Culture; 31. Air Breathing & Carnivorous Fish Culture; 32. Sewage Fed Fisheries; 33. Induced Breeding 34. Inland Fisheries; 35. Marine Fisheries; 36. Population Dynamics; 37. Exotic Fishes; 38. Planktons; 39. Aquatic Weeds and Their Control;  40. Aquatic Pollution; 41. Larvivorous Fishes in Relation to Public Health; 42. Fish Pathology and Cure; 43. Age Determination in Fishes; 44. Cage Culture; 45. Economic Importance of Fishes; 46. Fish Preservation; 47. Parental Care in Fishes; 48. Prawn Fishery; 49. Fisheries Today - Growth  Expansion and Trade; 50. Freshwater Aquarium; 51. Common Freshwater and Marine Food-Fishes of India; 52. Integrated Fish Farming; 53. Geographical Distribution of Fishes Ichthyogeography; 54. Fish-Fishery Aquaculture: Potential and Prospects; Selected  References.