Characters: Colonies are massive to columnar with a smooth or hillocky surface. Corallites are rounded and equal in size. Costae do not alternate strongly. There are 12 primary septa.
Colour: Usually uniform or mottled grey, brown or cream.
Similar species: Cyphastrea chalcidicum, which has well developed alternating costae. Cyphastrea microphthalma has 10 primary septa.
