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Also known as Wire Bush Coral and Bottle Brush Coral. They grow in a single plane or several planes with branches growing out of various parts of the main fan. They have non-retractable polyps which are often trumpet shaped. They feed on plankton.
Found on coral and rocky reefs often in caves or under overhangs, at depths of 20 to 30m. Widespread in the Indo-Pacific region.
I see this type of coral a lot in these parts, at various depths.