Characters: Colonies are massive and usually hemispherical. Valleys are meandroid, parallel or sinuous, deep and 5-8 millimetres wide. Ambulacral grooves vary greatly in width within the same colony but may be wider than the valleys giving the superficial appearance of alternating valleys of two different sorts. Columellae are fine and do not form distinct centres.
Colour: Tan to yellowish- or grey-brown.
Similar species: Ambulacral grooves may reach the size of valleys of Colpophyllia natans.
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