Coral reefs support marine biodiversity in various ways. They provide food and shelter for a wide variety of marine species, including fish, invertebrates, and plants. Coral reefs also serve as breeding and nursery grounds for many marine organisms, helping to sustain populations of various species. Additionally, coral reefs play a crucial role in maintaining the health of marine ecosystems by providing essential habitats and supporting complex food webs. Ultimately, the high level of biodiversity found in coral reefs contributes to the overall health and resilience of the marine environment.