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Elkhorn coral
Acropora palmata
(Lamarck, 1816)

Colonies with thick rounded or flat branches, without distinct axial corallites. Colony diameter up to 3.5 meter, and more than 1 meter in height. Branch diameter between 5 and 25 cm, and 1-3 cm thick .

Golden-brown with light rims.

Corallites are porous protruding tubes, less than 5 mm long and 0.5-0.8 mm in diameter. They are densely packed, with 1-2 mm in between. A columella is absent.

On the reef at a higher level than Acropora cervicornis and Acropora prolifera up to within the reach of waves. Not in inner bays.

Abundant to common Bahamas and Caribbean; common to occasional South Florida.

Elkhorn coral (Acropora palmata)