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DescriptionA brilliantly coloured solitary coral. Up to 48 short, stout, evenly tapering tentacles span about 25 mm and are arranged in groups of six around the mouth. The tentacles are a rich translucent golden yellow colour (the colour restricted to the nematocyst warts) and shade into a yellow, orange or scarlet disc. The calcareous exoskeleton (corallum) is broad and low, about 10 mm across but usually less in height. The corallum is porous, spongy in texture and fragile; less durable than in other British corals.