The role of marine ecosystems in carbon cycling is crucial for regulating global climate systems. Oceans absorb significant amounts of carbon dioxide from the atmosphere, acting as a major carbon sink. Marine organisms, such as phytoplankton and corals, contribute to this process through photosynthesis and calcification. The health of marine ecosystems directly affects their capacity to store carbon. Protecting marine environments is essential for maintaining their ability to mitigate climate change and support biodiversity.