All Pavona

Pavona is a genus of colonial stony corals in the family Agariciidae, found in shallow waters in the Indo-Pacific region. Corals in this genus have a range of different forms – massive, meandering, columnar, leaf-like, and plate-like. A single species may vary in form according to the current, wave action, lighting conditions, and depth of its location. Members of the genus are distinguished from other corals by having no walls to the corallites, but having clearly delineated septocostae that connect each corallite to its neighbours, giving a flower-like pattern on the surface of the coral. The corallites themselves are shallow depressions with central columella and may be separated by ridges. The polyps (with the exception of Pavona explanulata) are only extended at night.