Human activities impact marine ecosystems at a global scale and all levels of complexity of life. Now-a-days Industrial pollution, soil erosion, deforestation, rapid industrialization, urbanization and land degradation are all worsening problem due to environmental contamination. Reportedly, many changes due to various anthropogenic activities such as changes in temperature regime and radioactive background, discharges of toxic effluents and inflow of nutrients, irretrievable water consumption and damage of aquatic organisms, landing of commercial species, destruction of shoreline and construction of drilling rig have been recorded. The concept of environmental contamination and its effect is extremely important for analyzing the changes in regional ecology due to anthropogenic activities.