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Mustard hill coral
Porites astreoides
Lamarck, 1816

Colonies plate-like in shallow, surging water, but forming rounded heads and domes in deeper water. The surface is lumpy and covered with closely set corallites, giving the colonies a porous appearance. Colonies up to 60 cm.

Most commonly yellow to yellow-green or yellow-brown, occasionally beige to gray. Polyps usually extended, giving the colonies a soft, fuzzy appearance.

Corallites 1.2-1.4 mm in diameter, with 12 septa, evenly spaced over the surface. The columella is trabecular.

Inhabit all reef environments, down to 50 m.

Abundant to common Forida, Bahamas and Caribbean.

Mustard hill coral (Porites astreoides)