Acropora palmata reaches 4 m across. Large Caribbean coral with flat wide branches resembling elk antlers (hence elkhorn). Ocher to yellow-brown color. Main builder of shallow Caribbean reef crests down to 30 m. Catastrophic 95% collapse since the 1980s from white-band disease, bleaching and hurricanes. IUCN Critically Endangered. Restoration programs in Florida, Belize, French Caribbean.
