UN Chronicle: It is estimated that 70 per cent of the Earths surface area is made up of oceans,1 the most productive habitat, comprising 75 per cent of all known species. This unique environment, which remains generally unexplored and hidden from the world, plays an important role in regulating global temperature and is the primary producer of oxygen. Coral reefs, which comprise only about 0.5 per cent of the ocean floor, are complex three-dimensional structures built up over thousands of years as a result of...