Coral Reefs

WHAT IS CORAL?
"Coral is a common name for members of a large class of marine invertebrates characterized by a protective calcium carbonate or horny skeleton." This is how the Microsoft Encarta Encyclopedia described coral. This calcium carbonate or horny skeleton is also called coral.
Coral may look like an inanimate rock, but it is actually a living animal. Corals belong to a group of animals that include sea anemones and jellyfish. These animals have tentacles with stinging cells and a single opening in the body. This group is known as the Phylum Cnidarians.
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