http://srilankatouristtrade.blogspot.com/2012/02/hikkaduwa-national-park-hikkaduwa-coral.html

A coral reef is an underwater habitat that supports life for thousands of different species of plants and animals. These reefs are usually found near shores and are very colorful. These reefs support hiding places for many fish and other animals that live there. They are called the “rainforests of the ocean” because they have so many different types of plants and animals living in them.