Bermeja Island

thumb|250px|A 1914 map showing U.S. claim on "Bermejo I."

Bermeja is a phantom islet once thought to lie off the north coast of the Yucatán Peninsula according to several maps of the Gulf of Mexico from the 16th to the 20th centuries. Despite being located somewhat precisely in relation to neighboring islands by notable Spanish cartographers of the 16th century, the island was not found in a 1997 survey, nor in an extensive 2009 study conducted by the National Autonomous University of Mexico (UNAM) on behalf of the Mexican Chamber of Deputies. Interest in the island arose in late 2008, fueled by the fact that if such an island existed, it would be important for determining the boundaries for exploitation rights of oil in Hoyos de Dona (Doughnut Holes) in the Gulf of Mexico.