The ocean also gives us insight on overall quality. Coral bleaching is the process of stressed corals expelling algae living on them, turing the corals white. What causes this is change in temperature weather it be hot or cold, pollution, light, nutrients, and change of salinity in water which is how much salt is in the water. An occurrence that has been happening lately is an abundant amount of coral bleaching. In 2016 and 2017, half of the coral in the Great Barrier Reef were affected by coral bleaching. Rising temperatures are the main cause of this problem. Corals have a small temperature range they can live off. With the climate getting warmer, it is clear to see it’s affecting the ocean as well. Coral bleaching is also caused by salinity in