Description
Pillar coral forms an encrusted base from which grow vertical cylindrical, round-ended columns. This coral can grow to a height of 3 m (10 ft) with pillars more than 10 cm (4 in) wide but is usually much smaller than this. The corallites from which the polyps protrude are smaller than 1 cm (0.4 in) in diameter and arranged in shallow meandering valleys with low ridges in between. The skeleton of the coral is not usually visible because the polyps are typically extended during the daytime, unlike most other coral species. The mass of undulating tentacles gives the coral a furry appearance. This coral is usually some shade of beige or brown.
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