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The contamination of the aquatic systems with heavy metals from natural anthropogenic sources has become a global problem which poses threats to ecosystems and natural communities. Hence this study reviews the effects of heavy metals in freshwater fishes. Fishes bioaccumulate heavy metals (including cadmium, zinc, lead and copper) through various organs such as gills, liver, stomach and intestine. The effects of these heavy metals are highlighted. Keywords : Bioaccumulation, Toxicity, Heavy metals, Cadmium, Zinc, Lead, Copper, Freshwater fish

Bioaccumulation and toxic effects of some heavy metals in freshwater fishes