is an arm of the Gulf of Mexico
occupying an indentation of the Florida
coast to the west of where the Florida peninsula joins the United States mainland
. It is bordered by Taylor
counties. The Aucilla
, St. Marks
rivers drain into the bay. It is named for the Apalachee
tribe which lived between the Aucilla and Ochlocknee rivers until the 18th century. Most of the bay's coast is the St. Marks National Wildlife Refuge.