Complete the Words

Coral reefs are often called the 'rainforests of the sea' due to their incredible biodiversity. are underwater built tiny known as coral polyps, which form colonies. structures provide shelter food for a array of marine , including fish, mollusks, and sea . Reefs also protect coastlines from erosion and the damaging effects of large waves and storms. The health of coral reefs is a critical indicator of the overall condition of the world's oceans.