Oceans absorb approximately 30% of all carbon dioxide existent in the atmosphere, therefore, as more fossil fuel gets burned, ocean life will continue to be impacted negatively by the global warming. One critical change brought by climate change is the continuous reduction of phytoplankton. These are some small plants that serve as a food source for the entire ocean life, being responsible for almost half of the world's photosyntehic activity.
Also ocean's warmer surface and acidification increase the danger to many marine species, such as molluscs, coral reefs and crustaceans. Because coral reefs are so sensitive to higher temperatures, we can already observe that many have died due to global warming.
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