Characters: Colonies are submassive or encrusting, and meandroid, with sinuous valleys. Columella centres and paliform lobes are well developed. Colour: Very variable but usually a uniform dull green or brown or with walls and valley floors of contrasting dull or bright colours. Similar species: Goniastrea australensis is the only fully meandroid Goniastrea. Underwater, it may be difficult to distinguish from Platygyra lamellina, but skeletons are readily distinguished by their well developed columella centres and paliform lobes. Submeandroid colonies may resemble Goniastrea pectinata. See also Oulophyllia crispa. Habitat: Shallow or clear water. Abundance: Common, may be a dominant species of subtropical reefs.