Characters: Colonies have large upright cylindrical branches and may form stands more than 5 metres across. Horizontally fused basal branches are only developed in shallow water. Radial corallites are of mixed sizes and shapes and are rasp-like. Colour: Cream, brown, blue, yellow and green. Individual colonies are uniform in colour except for the branch ends, which are pale. Similar species: Radial corallites are similar to those of Acropora robusta and A. abrotanoides, but these species have different growth-forms except in very shallow water. Acropora formosa, A. abrolhosensis and A. grandis may have similar growth-forms but corallite sizes and shapes are clearly distinct. Habitat: Deep sandy lagoons to upper reef slopes. Abundance: Common.