Characters: Colonies consist of dense thickets of short cylindrical or tapered branches. They are frequently over 2 metres across and may form extensive single species stands. Axial corallites are exsert and tubular. Radial corallites are uniform in size and tubular, with flaring lower lips.
Colour: Uniform cream, yellow or pale brown.
Similar Species: Acropora haimei which has primarily upright branches and corallites of irregular size. Acropora tumida and A. striata have similar growth-forms; the latter also has similar corallites except that radial corallites are irregular with less conspicuously flaring lower lips. See also A. donei.
Habitat: Shallow reef environments and rocky foreshores.