Characters: Colonies have prostrate main branches with bottlebrush-like secondary branching producing lobed or cushion-like colonies. Axial corallites are large and rounded. Radial corallites are short, with thick walls. Colour: Dull greenish-grey or brown with pale brown or orange branch tips. Similar species: Acropora samoensis, which has shorter branches and distinctive axial corallites. See also A. digitifera. Habitat: Upper reef slopes and lagoons. Abundance: Common.