Chief Posted August 20, 2012 Share Posted August 20, 2012 Source: Phys.org August 19, 2012 "Corals are made up of many polyps that jointly form a layer of living tissue covering the calcareous skeletons. They depend on single-celled algae called zooxanthellae, which live within the coral polyps. read more More... Quote Link to comment Share on other sites More sharing options...
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