Trace metal content of benthic organisms as bio-indicators of pollution is a very outstanding research line on Marine Ecotoxicology (Herraiz et al. 1988; Lozano et al. 1996). Pollution effects are the centre of interest in marine research due to the importance of marine ecosystems and human living because of consumption of seafood is a significant pathway to metal exposure in the human population living in coastal areas (Hashmi et al. 2002).