Characters: Colonies are corymbose cushions, with short uniform branches. Axial corallites are distinctive; they are tubular in shape. Radial corallites are closely compacted and all the same size. They have prominent lower lips giving a scale-like appearance. Colour: Commonly green with orange tips, also a distinctive bright salmon pink, pale green or blue (which may photograph purple). Similar species: Acropora convexa and A. prostrata. See also A. aspera, which has similar radial corallites but these are of two mixed sizes, and A. pulchra, which has smaller corallites of mixed sizes. Habitat: Shallow water, usually reef flats, but also lagoons and upper reef slopes. Abundance: Common.