The health of the human life depends on the vitality and vigour of the environment. Deterioration in the environment can cause severe damage to the human health. Also aquatic environment, which covers two-thirds of the planet, is inhabited by the majority of extant species in different ecological niches; moreover many of them are important sources of human food (Frenzilli et al., 2009). Heavy metals are natural components of the biosphere. Living organisms need trace quantity of some heavy metals which include iron, cobalt, copper, manganese, molybdenum, strontium, vanadium and zinc though some are essential for life (Saidi, 2010). However, the excessive amount of metals can be detrimental to living organisms. In the meanwhile, other heavy metals such as cadmium, lead, mercury, chromium etc., in the marine environment i.e., both in seawater and sediments, can accumulate over times into aquatic food chain organisms causing serious illness (Camargo and Alonso, 2006). Sediments and the biota are general metal reservoirs in aquatic environments. The concentrations of heavy metals in water may vary considerably depending on annual and seasonal fluctuations in physico-chemical parameters (Aguilera et al.,2006). The elevated levels of metals in seawater and sediments can cause a severe reduction or, sometimes, elimination of intolerant species, thereby having a significant effect on the diversity and trophic structure of the biological community (Gbaruko and Friday, 2007). The level of accumulation in biota is depend on the chemical effects of metal, its tendency to bind to particular materials and, on the lipid content and composition of the biological tissues as well as the quality of seawater (Gbaruko and Friday, 2007).