We, the National Marine Fisheries Service (NMFS), issue a final rule designating critical habitat for elkhorn (Acropora palmata) and staghorn (A. cervicornis) corals, which we listed as threatened under the Endangered Species Act of 1973, as amended (ESA), on May 9, 2006. Four specific areas are designated: the Florida area, which comprises approximately 1,329 square miles (3,442 sq km) of marine habitat; the Puerto Rico area, which comprises approximately 1,383 square miles (3,582 sq km) of marine habitat; the St. John/St. Thomas area, which comprises approximately 121 square miles (313 sq km) of marine habitat; and the St. Croix area, which comprises approximately 126 square miles (326 sq km) of marine habitat. We are excluding one military site, comprising approximately 5.5 square miles (14.3 sq km), because of national security impacts.