Ocean ecosystems are vast and complex, but they play a vital role in the health of our planet. Ocean ecosystems provide a variety of important services, such as regulating the climate, purifying the air and water, and providing food and resources for humans. For example, phytoplankton in the ocean produce half of the oxygen we breathe, and coral reefs provide a home for 25% of all marine species. In addition, ocean ecosystems absorb carbon dioxide from the atmosphere, helping to regulate the climate. And, they provide a range of important food sources, such as fish, crabs, and oysters. Overall, ocean ecosystems are
