Hidden beneath the ocean waters, coral reefs teem with life. Reefs support more species than any other marine environment and rival rainforests in their biodiversity. Countless numbers of creatures rely on coral reefs for their survival. Coral reefs face an increasing array of threats, including pollution, unsustainable fishing practices, and global climate change. However, there’s so much we can (and are) doing to protect and preserve coral reefs and all they do for us. See how NOAA is leading U.S. efforts to study and conserve these precious resources.