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Nestled in somewhat protected areas on top of the reef 
you'll find
octo-corals of many types. Most people know them as gorgonians , sea fans
or whips, or soft corals.  What makes them similar is the number of 
tentacles around their central mouth (eight, therefore "octo" coral).
One of the best ways for macro photographers to get good octocoral 
shots is
in the feet up - head down position shown here. This student is preparing
to make a picture of a sea whip (a type of gorgonian/octocoral/soft 
coral).
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