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This study was carried out to assess concentration of heavy metals (lead, cadmium and copper) in two types of fish carp fish and binni fish (Cyprinus carpio and Barbus bynni) during the summer and winter seasons,in Al- Dalmaj marsh in Al-Diwaniyah Governorate, middle Iraq we have measurement and determined concentration heavy metals in in gills and muscles of fish. The results of measurement of the concentration of heavy elements are shown , the highest average concentration of elemental Lead fish the highest concentration of lead was recorded was 223.11 ppm in the gills samples of the Caribbean fish Cyprinu scarpio during the summer season. For Cadmium concentrations, in fish, the highest concentration of 1.81 ppm in the gills of buni fish Barbus bynni during the winter season. The concentration of the copper element, fish samples the highest concentration of the Copper element reached 6.236 ppm in the gills of the buni fish Barbus bynni during the winter season. All measurements of heavy metals in fish were relatively high. This led to the conclusion that the bioaccumulation of fish with these minerals came from water. It means that the water is relatively contaminated with heavy metals.