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Galaxea longisepta

Fenner and Veron, 2000

Colonies are small and always encrusting. Branches, if formed at all, are small and inconspicuous. Corallites are up to 4 millimetres diameter, with larger corallites near the colony centre, smaller ones at the periphery. They are widely separated. Septa are very long and irregular. They form three distinct cycles in larger corallites. Columellae are sometimes visible deep within the corallite. The coenosteum is blistery.

Colour: Dark green or brown with white corallite rims.

Habitat: Vertical rock faces protected from wave action.

Abundance: Usually rare.

Similar species: Galaxea acrhelia , Galaxea horrescens

Taxonomic note: Source reference: Veron (2000). Taxonomic reference: Veron (2002).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Galaxea longisepta.  Philippines.  Colonies are always encrusting with short irregular branches.  Charlie Veron.

Galaxea longisepta.Philippines.Colonies are always encrusting with short irregular branches.Charlie Veron.

Galaxea longisepta.  Indonesia.  A small plate-like colony.  Doug Fenner.

Galaxea longisepta.Indonesia.A small plate-like colony.Doug Fenner.

Galaxea longisepta.  Coral Sea.  Corallite detail, showing the long irregular delicate septa.  Neville Coleman.

Galaxea longisepta.Coral Sea.Corallite detail, showing the long irregular delicate septa.Neville Coleman.

Galaxea longisepta.  Indonesia.  Small colonies such as this may be indistinguishable from those of Galaxea acrhelia.  Doug Fenner.

Galaxea longisepta.Indonesia.Small colonies such as this may be indistinguishable from those of Galaxea acrhelia.Doug Fenner.

Galaxea longisepta.  Indonesia.  Showing colony.

Galaxea longisepta.Indonesia.Showing colony.

Galaxea longisepta.  Indonesia.  Showing corallites.

Galaxea longisepta.Indonesia.Showing corallites.

Galaxea longisepta.  Indonesia.  Showing colony from muddy environment.

Galaxea longisepta.Indonesia.Showing colony from muddy environment.