Coral reefs support marine biodiversity in several ways. They provide shelter, food, and breeding grounds for a wide variety of marine species. Coral reefs are home to numerous species of fish, invertebrates, and other marine organisms, creating a diverse and complex ecosystem. The structure of coral reefs also helps protect coastal areas from erosion and storm damage. Additionally, coral reefs contribute to the overall health of the ocean by cycling nutrients and providing valuable resources for marine life.