French Reef, Key Largo, 45 feet

Snapper Ledge, Key Largo, 30 feet

Fluorescent, Benwood wreck, Key Largo, 40 feet

Locally common on shallow reefs.  Forms large hemispherical colonies or encrusting, ridges incised by a thin groove, uniform brown or gray, rarely with green valleys.  Surface features are larger than Diploria.  Bermuda, Florida to Venezuela & the Gulf of Mexico.