Cay Lobos or Lobos Cay, islet and district (including Cay Sal, 7 sq mi/18.1 sq km), S Bahama Isls., on S fringe of the Great Bahama Bank, separated from Cuba by 20-mi/32-km-wide Old Bahama Channel, 185 mi/298 km S of Nassau; 22°24'N 77°37'W. Lighthouse.