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Sustainable Developmental Goal 14 (SDG 14) aspires to conserve and sustainably use the oceans, seas and marine resources for sustainable development.Climate change is increasingly threatening the world’s oceans in the form of overfishing, aquatic pollution and ocean acidification. Marine protected areas are defined as areas of intertidal or subtidal terrain and overlying water and associated flora and fauna and historical and cultural features that have been reserved by law or other effective means to protect part or all of the enclosed environment.On average, marine protected areas as a proportion of a country’s total marine area declined across the Commonwealth from 4.51% in 1990 to 3.85% in 2016. However, in the rest of the world, the percentage of marine protected areas increased on average from 3.18% in 1990 to 5.76% in 2016. Among Commonwealth countries, the proportion of marine protected areas was the lowest in Mauritius and highest in Australia, according to the World Bank’s data for 2016.