THIS BOOK IS BASED ON RESEARCH WORK ON FISH FINGERLING FEED . IF FEED IS NOT GOOD INFESTED WITH FUNGUS OR ANY CONTAMINANT , THERE WERE CHANGE IN PHYSIOLOGY OF FINGERLINGS THAT LED TO DEFORMITY AND HEAVY MORTALITY OF FINGERLINGS IN STOCK., THE BLOOD PARAMETERS LIKE HAEMATOLOGY AND SERUM ENZYMES SGOT, SGPT, SERUM PROTEIN , ALBUMIN , GLOBULIN , WATER PARAMETERS WERE STUDIED AFTER FEEDING WITH FUNGUS INFESTED FEED AND MAJOR CHANGE WAS OBSERVED.