Staghorn Coral

About

Found on upper reef slopes and in the punishing environment of tidal pools, Acropora retusa is a coral shaped by high energy and intense light. It grows as flattened plates studded with short, thick finger-like branchlets, giving colonies a distinctly chunky, low-profile appearance compared to the more delicate branching forms many hobbyists associate with Acropora. The corallites themselves have thick, rounded walls with wide openings, and the radial corallites lie close against the branches, taking on a nostril-like shape toward the tips. A useful identification feature when you know what to look for. Axial corallites are not well defined, which further sets this species apart from more typical Acropora growth forms. In the wild, coloration runs to brown, though captive specimens may express different tones depending on lighting and zooxanthellae density. Because its natural habitat is among the most physically demanding on any reef, this coral expects a lot from an aquarium setup. Genuinely high flow and intense lighting are not optional. This is firmly a species for experienced reef keepers who can dial in and maintain demanding conditions consistently. It is reef safe and poses no threat to neighbors, but it will not tolerate corners being cut on water quality or flow.