Is the Gulf of Mexico and the Caribbean Sea Part of the Atlantic Ocean?

The Gulf of Mexico part of the Atlantic Ocean.

By definition, a gulf is a part of a sea or ocean that extends into land.

The Caribbean Sea is also part of the Atlantic Ocean.

Three times more water from U.S. rivers drains into the Atlantic Ocean than into the Pacific.

The Gulf of Mexico is the ninth largest body of water in the world, and is a partially landlocked ocean basin surrounded by the North American continent and the island of Cuba.