Characters: Colonies are tables, usually side-attached, with generally horizontal radiating anastomosing branches which may form an almost solid plate. There is usually no development of vertical branchlets. Radial corallites are immersed to tubular, with nariform openings. Colour: Brown, grey or green, often with pale margins. Similar species: Acropora plumosa. Acropora glauca from far southern localities may have a very similar growth-form. See also A. tutuilensis and A. downingi. Habitat: Upper reef slopes, back reef margins and fringing reefs. Abundance: Common