Coral Reefs are important for the ocean ecosystem and there is reasons to it. But somehow there is a thing where its dying off in a rate. About 14% of the world has lost its coral reefs. An example is, The Great Barrier Reef experiences three mass bleaching events. When a coral reef is gone, the only thing left behind is the white part which is called the skeleton. This includes damage when there is prolonged effects of warming ocean surface temperatures.