Abstract
Heavy metals are matters that form the most dangerous side of chemical water pollution due to theirability to bioaccumulate and biomagnify and can not be eliminated from the body by metabolic activites. In thisstudy literature is reviewed by examining studies on general characteristics and sources, uptake by fish,concentration evaluations and effects on fish and other aquatic organisms of heavy metals such as cadmium,copper, manganese, nickel, iron and lead. Studies examined showed that heavy metals cause severe damage onfish thus endanger fish health and ecosystem and constitute respectable risks for human health via consumption ofheavy metal contaminated fish.