CONTENTS: UNIT – I 1. HEALTH AND DISEASE IN FISH, 2. PREDISPOSING FACTORS TO DISEASE IN FISH, 3. HOST-PATHOGEN-ENVIRONMENTAL INTERACTION, 4. HOST-PATHOGEN-ENVIRONMENT INTERACTION IN BACTERIAL DISEASE, 5. HOST PATHOGEN ENVIRONMENTAL INTERACTION IN VIRAL DISEASE, 6. HOST PATHOGEN ENVIRONMENTAL INTERACTION IN FUNGAL DISEASE, 7. HOST PATHOGEN ENVIRONMENTAL INTERACTION IN PARASITIC DISEASE, 8. WATER AND SOIL QUALITY AND ITS ROLE IN FISH AND SHRIMP HEALTH, UNIT – II: 1. STRESS AND ITS ROLE IN FISH HEALTH: DEFINITIONS, TYPES, AND GENERAL ADAPTATION SYNDROME (GAS), 2. CELLULAR PATHOLOGY, 3. CELLULAR INJURY, 4. INFLAMMATION, 5. SYSTEMIC PATHOLOGY OF FISH AND SHELLFISH, 6. SYSTEMIC PATHOLOGY IN SHELLFISH, UNIT – III: 1. BACTERIAL DISEASES OF FISH AND SHELLFISH, 2. VIRAL DISEASES OF FISH AND SHELLFISH, 3. PARASITIC DISEASES OF FINFISH AND SHELLFISH, 4. FUNGAL DISEASES OF FISH AND SHELLFISH, 5. DISEASE DEVELOPMENT PROCESS IN AQUACULTURE, UNIT – IV: 1. NUTRITIONAL PATHOLOGY: MACRONUTRIENTS, 2. MICRONUTRIENT: VITAMINS, 3. MICRONUTRIENT: MINERALS, 4. TOXIC COMPONENTS OF THE DIET, UNIT – V: 1. DISEASE DIAGNOSTICS, 2. CASE HISTORY: THE FIRST STEP IN DIAGNOSIS, 3. LEVELS OF DISEASE DIAGNOSIS, 4. GENERAL DIAGNOSTIC TECHNIQUES IN AQUATIC ANIMAL DISEASES, 5. GOLD STANDARD TECHNIQUES IN AQUACULTURE DISEASES, 6. EMERGING TRENDS IN AQUATIC ANIMAL DISEASE DIAGNOSIS.