A Research Report Submitted in Partial Fulfillment of the Requirement for the Award of the Degree of Master of Laws (LLM) of Mzumbe University.The law of the sea is of systematic importance to the discipline of public international law, it teaches the society about historical, social, economic and political forces that play upon the formation and interpretation of legal principles. It has provided out solutions of different problems worldwide, including marine pollution as it has been indicated on article 199-222 of the UNCLOS III of 1982. Marine pollution is a wide reaching problem and its influence to the health of human populations is great. This paper provides the insight view the enforcement of the law of the sea of 1982 using Tanzania as a case study. The study finds that these kinds of pollutions are not only seriously affecting the human health and economic welfare, but also the animals. It would appear that many coastal states including Tanzania are not keen to watch out the problems caused by marine vessels seemingly infringing what the Convention stands for. The study reveals also the contradiction caused by UNCLOS III via its articles in narrating down the control of marine pollution from marine vessels, hence, raising difficulties in enforcement. It is submitted that states including Tanzania should restructure their policies and regulations to conform to their assumed obligations under the Convention. According to this study, still time left in the hands of global institutions, governments and local bodies to use the 1982 United Nations Conventions on the Law of the Sea to balance the marine problems caused by marine vessels worldwide including Tanzania for safeguarding the interests of marine industry.