Characters: Colonies consist of prostrate or upright, tapered branches which have many branchlets and incipient axial corallites. Corallites are immersed to long and tubular, giving branches a rough, irregular appearance. Tentacles are not extended during the day.
Colour: Deep blue (which may photograph mauve) or brown.
Similar Species: Acropora horrida, which has smaller, more compact corallites and tentacles extended during the day.
Habitat: Lagoons.
Abundance: Common at Elizabeth and Middleton Reefs of south-east Australia, rare elsewhere.
Taxonomic Note: Similar to Acropora horrida but much less common.
Taxonomic References: Veron and Wallace (1984); Wallace (1999); Veron (2000a); Wallace, Done and Muir (2012);
Identification Guides: Veron (1986a);
