Complete the Words

Coral reefs are vast underwater structures built from the skeletons of tiny marine animals called coral polyps. vibrant ecosystems are often referred as the 'rainforests of the sea' due to incredible biodiversity. typically in , shallow, clear waters where can . Reefs provide a critical habitat for a quarter of all marine species, including fish, mollusks, and crustaceans. They also protect coastlines from storms and erosion and support local economies through tourism and fishing.