Post-diplostomoses is disease of freshwater fishes caused by meta-cercaria of trematode posthodiplostomum cuticola of the family diplostomidae, orderly trematoda which is characterized by deposit of black pigment in the areas of lesion of integumentary tissue of fishes. The document consists of 5 Secs. Section 1 lays down general provisions. Section 2 regards epizootology. Section 3 regards clinical symptoms and patologo-anatomical changes. Section 4 regards diagnoses. Section 5 regards prophyla