Colonies are large circular tables or clumps often over 2 metres across, with a fine structure consisting of a network of horizontal branches and fine, evenly spaced branchlets. Small colonies are usually cushion-shaped. Axial corallites are tubular with rounded margins. Radial corallites are tubular and appressed.
Usually pale grey or brown, sometimes bright blue (which may photograph purple), purple or green. Corallite lips may be a contrasting colour.
Shallow reef slopes with a high Acropora diversity, but protected from strong wave action.
Common in shallow water.
Taxonomic and distribution note: Western Indian Ocean and Red Sea corals are distinctive and are attributed to this species with doubt. Source reference: Veron (2000). Taxonomic references: Veron and Wallace (1984), Wallace (1999). Additional identification guides: Veron (1986), Nishihira and Veron (1995).
displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Acropora subulata.Great Barrier Reef, Australia.Compact colony in shallow water.Ed Lovell.
Acropora subulata.Papua New Guinea.Common colony shape in shallow water.Charlie Veron.