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Family Poritidae


Porites horizontalata

Wakatobi, Indonesia


Tutuila, American Samoa


Locally common on shallow reefs.  Encrusting plates with some twisted branches with a pitted appearance, shallow calices 1.5mm in diameter with 6 pali between rounded or sharp ridges.  Pale brown, green, gray, or pink.  Porites vaughani is also plate-like but calices have 8 pali, while Porites rus has calices smaller than 1mm.  Sri Lanka to Okinawa and east to Samoa.

All coral skeletons illustrated are from scientific collections taken prior to 1998.