The ocean known as the world's most biodiverse is the Pacific Ocean. Covering more than 63 million square miles, it is home to an incredible variety of marine life, including thousands of fish species, coral reefs, and various mammals. The rich ecosystems of the Pacific are critical for maintaining global biodiversity. It houses distinct environments such as deep-sea trenches, coral reefs, and open ocean, all contributing to its ecological richness. This biodiversity is essential for sustaining marine food webs and supporting the livelihoods of coastal communities.