Corals are incredible animals that are comprised of many small and sometimes large colonies of individual polyps.  Coral reefs can be found in all of the tropical oceans of the world.  These reefs provide shelter and food for most marine animals in the entire ecosystem.  Corals are usually very bright in color, allowing similar colored fish and invertebrates to be easily camouflaged.  Corals are identified by several categories, including SPS (Small Polyp Stony), LPS (Large Polyp Stony), Soft Corals, Zoanthids, Gorgonians, Mushrooms, and "Frags"(fragments of larger coral colonies).