Characters: Colonies are usually small. Corallites are sometimes compact, but usually sprawl irregularly. They are characteristically curved at the colony periphery and average 8 millimetres diameter. Colour: Pale brown. Similar species: Caulastrea furcata, which can be distinguished underwater by its colour; corallites are also more regular, larger, have more numerous septa and better developed costae. Habitat: Flat substrates, often found with C. furcata. Abundance: Uncommon.