Part of a legal description of a boundary line of Dixie County, for instance, says it goes "southerly down the thread of the main stream of said Suwannee River to the Gulf of Mexico; thence along said Gulf of Mexico, including the waters of said gulf within the jurisdiction of the State of Florida, to the mouth of the Steinhatchee River."

The U.S. Coast Guard (USCG) started using the term “Gulf of America” to refer to the Gulf of Mexico on Tuesday, one day after President Trump signed an executive order setting in motion the process to change its official name.