... are a highly developed grazer of the reef. With strong calcified, fused teeth that scrape off coralline algae and the calcareous surface that most algae live on. They are one of the major sources for the fine calcareous silt found around a reef.
Colony number 2, branch structuring of small section of colony after approximately 6 months of growth from small fragment. Photograph taken by Dallas Warren, 1999.
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