Bermeja is an islet lying off the north coast of the Yucatán peninsula according to several maps of the Gulf of Mexico from the 16th to the 19th 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.