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Acropora gemmifera

(Brook, 1892)

Colonies are digitate. Branches are thick, tapering to a small axial corallite. Radial corallites are of two sizes, usually in rows. The larger sized corallites increase in length towards branch bases, where incipient axial corallites are common.

Colour: Usually purple, blue (which may photograph pink), cream or brown, with blue or white branch tips. Dark grey with white corallite rims and yellow axial corallites in the western Indian Ocean.

Habitat: Exposed upper reef slopes and flats.

Abundance: Common.

Similar species:

Taxonomic note: Source reference: Veron (2000). Taxonomic references: Veron and Wallace (1984), Wallace (1999). Additional identification guides: Veron (1986), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Acropora gemmifera.  Madagascar.  A. gemmifera (left) adjacent to A. humilis (right).  Charlie Veron.

Acropora gemmifera. Madagascar. A. gemmifera (left) adjacent to A. humilis (right). Charlie Veron.

Acropora gemmifera.  Guam.  A. gemmifera (left) adjacent to A. monticulosa (right).  Gustav Paulay.

Acropora gemmifera. Guam. A. gemmifera (left) adjacent to A. monticulosa (right). Gustav Paulay.

Acropora gemmifera.  Tanzania.  Typical digitate branches.  Charlie Veron.

Acropora gemmifera. Tanzania. Typical digitate branches. Charlie Veron.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing increase in size of radial corallites down the side of branches.  Valerie Taylor.

Acropora gemmifera. Great Barrier Reef, Australia. Showing increase in size of radial corallites down the side of branches. Valerie Taylor.

Acropora gemmifera.  Madagascar.  Large colony exposed to wave action.  Charlie Veron.

Acropora gemmifera. Madagascar. Large colony exposed to wave action. Charlie Veron.

Acropora gemmifera.  Madagascar.  Surface detail of a plate.  Charlie Veron.

Acropora gemmifera. Madagascar. Surface detail of a plate. Charlie Veron.

Acropora gemmifera.  Madagascar.  Rosette of radial corallites.  Charlie Veron.

Acropora gemmifera. Madagascar. Rosette of radial corallites. Charlie Veron.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing radial corallites.

Acropora gemmifera. Great Barrier Reef, Australia. Showing radial corallites.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing plate formation.

Acropora gemmifera. Great Barrier Reef, Australia. Showing plate formation.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing skeletal detail.

Acropora gemmifera. Great Barrier Reef, Australia. Showing skeletal detail.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing plate formation.

Acropora gemmifera. Great Barrier Reef, Australia. Showing plate formation.

Acropora gemmifera.  Great Barrier Reef, Australia.  Showing branching pattern.

Acropora gemmifera. Great Barrier Reef, Australia. Showing branching pattern.

Acropora gemmifera.  Middleton Reef, south-eastern Australia.  Showing branch tip.

Acropora gemmifera. Middleton Reef, south-eastern Australia. Showing branch tip.