Acropora robusta (Dana, 1846)
Common throughout the Solitary Islands Marine Park. Recorded from the Chagos Islands in the Indian Ocean to Tahiti in the Central Pacific Ocean. In Australia recorded from the Houtman Abrolhos Islands in Western Australia, across the tropical north, the Great Barrier Reef and the Coral Sea.
Prefers shallow reef where it may be common on reef margins exposed to strong wave action.
Irregular shaped colonies, often with thick conical branches at the centre, radial corallites are rasp like in appearance, see bottom photograph.
Colour may vary from bright green to yellow or pink/brown with lighter branch tips.
Veron, J.E.N., Corals of Australia and the Indo-Pacific. Angus and Robertson Publishers, 1986. Pp. 146.