| Summary: | The aim of the present study was to determine heavy metal accumulation in water, sediment and some tissues of Anguilla anguilla along with determining histopathological and genotoxic effects of accumulation on these tissues by using light microscopy. Water, sediment and fish tissue samples taken from different sites of 3 different study areas were studied and the order of accumulation of metals was Fe>Pb>Mn>Co>Zn>Ni> Cr>Cu>Cd in water, Fe>Co>Mn>lpb>Zn>Ni>Cr>Cu>Cd in sediment and Cd>Mn>Cu>Cr>Ni>Fe>Zn>Co>lpb, Cd>lpb>Ni>Cr>Mn>Cu>Fe>Co>Zn and Cr>Ni>Zn>Cd>lpb>Mn>Cu>Fe>Co in liver, muscle and gill of fish, respectively. In histopathological studies, a decrease in the length of primary and secondary lamellae of gills, fusion in secondary lamellae, cellular proliferation, clavate lamellae formation and necrosis were observed. In liver tissue, dilation of sinusoid, increase in the number of erythrocytes, ruptured hepatocytes, decrease in glycogen accumulation and vacuolization were observed. In muscle tissue, necrosis, cellular dissolution and loss of striatation in muscle fibers were found. It was observed that pollution of water had no genotoxic effect on Anguilla anguilla.
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