What is a very large ocean inlet such as the one that sperates Florida from Mexico?

A very large ocean inlet such as the one that separates Florida from Mexico is called a gulf. The Gulf of Mexico is a large, semi-enclosed body of water located between the southeastern United States, Mexico, and Cuba. It is connected to the Atlantic Ocean by the Straits of Florida and to the Caribbean Sea by the Yucatán Channel. The Gulf of Mexico is the ninth largest body of water in the world by surface area, with a total area of approximately 1.6 million square kilometers (600,000 square miles).