Characters: Colonies are digitate. Branches are of uniform thickness and straight or slightly curved. Sub-branches are only formed near the base of main branches. Axial corallites are well defined. Radial corallites are short and tubular, of uniform size and are neatly arranged in rows down the sides of branches. Colour: Pale brown with white corallite openings. Similar species: Acropora humilis, which has tapered branches, larger axial corallites and larger, more widely spaced radial corallites. Habitat: Exposed upper reef slopes and flats. Abundance: Rare.