Characters: Colonies are corymbose clumps, cushion-shaped or prostrate, depending on the length of branchlets. Branchlets are thin and delicate. Axial corallites are long and tubular. Radial corallites are scale-like, lightly structured and do not form a rosette. Colour: Pale cream, brown, blue or pink. Tentacles are frequently extended during the day. Similar species: Acropora tenuis, which has thicker branchlets and radial corallites arranged in a rosette. See also A. insignis. Habitat: A wide variety of environments from exposed upper reef slopes to turbid lagoons. Abundance: Sometimes common.