Characters: Colonies are corymbose plates up to approximately one metre across, with short, uniform, evenly spaced, non-tapered branchlets bearing numerous elongate thin walled corallites. There is usually more than one axial corallite per branchlet. Radial corallites near branchlet tips are tubular and appressed.
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Classification: Biota > Animalia (Kingdom) > Cnidaria (Phylum) > Anthozoa (Class) > Hexacorallia (Subclass) > Scleractinia (Order) > Acroporidae (Family) > Acropora (Genus) > Acropora willisae (Species)