Elkhorn coral (Acropora palmata) is a branching coral. Branching corals grow in the shallow areas of the reef crest and serve to break up the wave action as it comes onto the reef. The branches of elkhorn coral resemble an elk's rack of antlers, thus its name. (photo: Paige Gill - Florida Keys NMS)

Source:http://www.sanctuaries.nos.noaa.gov/pgallery/pgflorida/living/living_7.html archive copy at the Wayback Machine

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