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Blue crust coral
Porites branneri
Rathbun, 1887

Colonies form thick encrustations, of 15 cm in diameter, with knobby projections of 2.5 cm in diameter. Extended polyps give the colony a soft, fuzzy appearance. When the polyps are retracted, small, pitted, polygonal corallites give the colony a porous appearance.

Bluish to pale lilac and purple.

Calices narrowly spaced with a poorly developed wall. Corallites with 12 septa, 1.6-1.8 mm in diameter. Columella trabecular and discontinuous.

Inhabit shallow, dead areas of older reefs, down to 12 m.

Rare South Florida, occasional to uncommon Bahamas and Caribbean.

Blue crust coral (Porites branneri)