Coral is a type of limestone formation which is composed of various types of organisms from the sea. These formations are made of the skeleton of dead organisms. Many coral that are all connected in a row can be refered to as a coral reef. The coral reef may take the shape of a large dome, a branching tree, a jagged crust, or small pipe organs. These reefs are beautiful in appearence because of their orange, purple, green, yellow, and tan colors. They are only found in warm waters because this animal can not live in a cold environment. There are three types of coral reefs in the oceans:
