Coral reefs are highly significant in marine ecosystems for several reasons. They are often referred to as the "rainforests of the sea" due to their high levels of biodiversity and the crucial role they play in supporting marine life. Coral reefs provide habitats and shelters for a wide variety of marine organisms, including fish, invertebrates, and plants. They also contribute to the overall health and stability of the marine ecosystem by protecting coastlines from erosion, supporting fisheries, and promoting nutrient recycling. Additionally, coral reefs are important for tourism and recreation, as they attract divers, snorkelers, and wildlife enthusiasts from around the world.