Characters: Colonies are encrusting and are devoid of any tendency to form branches. All corallites are rasp-like and are very small (averaging 1 mm diameter).
Colour: Bright green, sometimes brown.
Similar species: Acropora palmerae, which has some tendency to form branches and has larger corallites. See also A. crateriformis. This species looks like an encrusting Montipora underwater.
Habitat: Reef flats exposed to strong wave action or currents.