Toxicity and bioaccumulation of manganese and chromium in different organs of common carp (Cyprinus carpio) fish

[Display omitted] •Heavy metals effects fishes when its concentration arises from its normal.•Bioaccumulation of manganese and chromium was studied in Cyprinus carpio on hematological and biochemical parameters.•In organ, bioaccumulation is highest in the gills followed by intestine > muscles > skin > bones.•It is concluded that heavy metal can readily bio accumulate in the organs of fish. The present research work was carried out to determine the bioaccumulation of manganese and chromium in the gills, intestine, muscles, skin and bones, as well as its acute toxicity and effects on hematological and biochemical parameters in Common carp (Cyprinus carpio). Adult carps were exposed for 96 h to manganese sulphate and chromium chloride solution, a sub lethal concentration was used in the experiment. Bioaccumulation was highest in the gills followed by intestine > muscles > skin > bones. The concentration of hematocrit (HCT) (37.3 ± 0.36), hemoglobin (HGB) (9.0 ± 0.04), Red Blood Cells (RBCs) (3.7 ± 0.025), mean corpuscular volume (MCV) (121.2 ± 0.36), mean corpuscular hemoglobin (MCH) (41.3 ± 0.3) and mean corpuscular hemoglobin concentration (MCHC) (41.06 ± 0.072) was significantly higher at 96 h (P