Characters: Colonies are phaceloid or plocoid, the former being predominant in high latitudes and very shallow water. Corallites are short and sturdy, 10-15 millimetres diameter, and frequently have more than one mouth. Costae are poorly developed. Colour: Dull cream, grey and green. Similar species: Caulastrea connata. See also Favia vietnamensis. Habitat: Shallow reefs, and rocky foreshores of subtropical locations. Abundance: Common only in Western Australia and Japan.