The Seven Seas is a phrase that has been used to refer to different bodies of water at various times and places. The origins of the phrase can be traced back to ancient times, and in Greek literature, the Seven Seas were the Aegean, Adriatic, Mediterranean, Black, Red, and Caspian seas, with the Persian Gulf thrown in as a "sea". In Medieval European literature, the phrase referred to the North Sea, Baltic, Atlantic, Mediterranean, Black, Red, and Arabian seas. As trade picked up across the Atlantic, the concept of the Seven Seas changed again, and mariners referred to the Seven Seas as the Arctic, the Atlantic, the Indian, the Pacific, the Mediterranean, the Caribbean, and the Gulf of Mexico.
The Five Oceans of the world are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean, and the Southern Ocean. The Pacific Ocean is the largest ocean, covering more than 30% of the Earth, followed by the Atlantic Ocean, Indian Ocean, Southern Ocean, and the Arctic Ocean. The Southern Ocean is the newest and the smallest of the five oceans, and it is located off the coast of Antarctica.
