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Oken, 1815.

Galaxea astreata (3)

Type species: Galaxea fascicularis (Linnaeus, 1767)

Total number of species estimated: 4.

Characteristics: Corals zooxanthellate; encrusting to foliaceous, massive and columnar. Polyps (corallites) with pointed septa, shaped like crowns (Veron and Pichon, 1979). Colour cream, light to dark brown or greenish.

Ecology: Most common on reef slopes and the deepest parts of reef flats.

Range: Indo- West Pacific.

Additional remarks: The distinction with the arborescent corals of Acrhelia is arbitrary since specimens of Galaxea cf. prolifera Nemenzo and Ferraris, 1982 also tend to be branching.

Key references: Veron and Pichon, 1979; Nemenzo and Ferraris, 1982; Veron, 1986.

Genus Galaxea