Characters: Colonies form flat unifacial explanate plates which are commonly arranged in whorls. Corallites are at the bottom of long, roughly concentric V-shaped valleys. Centres are widely spaced (3-5 per cm). Septa are thick, do not alternate, and most reach the corallite centre.
Colour: Tan or grey, usually with pale margins.
Similar Species: Agaricia lamarcki. See also A. fragilis and A. undata, which have smaller valleys.
Habitat: Shallow reef environments.
Taxonomic References: Wells (1973a); Fenner (1999); Veron (2000a);
Identification Guides: Humann (2002);