"The Seven Seas" is a figurative term for all the seas of the known world. The phrase is used in reference to sailors and pirates in the arts and popular culture and can be associated with the Mediterranean Sea, the Arabian Seven Seas east of Africa and India (as told with Sinbad's seven journeys, and Captain Kidd), or is sometimes applied to the Caribbean Sea and seas around the Americas (with pirates such as Blackbeard).
The terminology of a "seven seas" with varying definitions was part of the vernacular of several peoples (as in the prior mentioned seas of Arabic literature), long before the oceans of the world became known (to those peoples). The term can now also be taken to refer to these seven oceanic bodies of water:
the Arctic Ocean
the North Atlantic Ocean
the South Atlantic Ocean
the Indian Ocean
the North Pacific Ocean
the South Pacific Ocean
the Southern (or Antarctic) Ocean
The World Ocean is also known as just "the sea", the expanse emanating from any marginal sea. The International Hydrographic Organization lists over 23 distinct bodies of water called seas.
The Arabs and their near neighbours considered the Seven Seas (البحار السبعة) to be the seas that they encountered in their voyages to The East. They were trading routes in ancient times and since the time of Muhammad, they are the places where Islam spread and is widely practised.
In the 9th century AD, author Ya'qubi wrote:
Whoever wants to go to China must cross seven seas, each one with its own color and wind and fish and breeze, completely unlike the sea that lies beside it. The first of them is the Sea of Fars, which men sail setting out from Siraf. It ends at Ra’s al-Jumha; it is a strait where pearls are fished. The second sea begins at Ra’s al-Jumha and is called Larwi. It is a big sea, and in it is the Island of Waqwaq and others that belong to the Zanj. These islands have kings. One can only sail this sea by the stars. It contains huge fish, and in it are many wonders and things that pass description.
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The ocean (also known as the sea or the world ocean) is a body of salt water that covers approximately 70.8% of the Earth and contains 97% of Earth's water. The term ocean also refers to any of the large bodies of water into which the world ocean is conventionally divided. Distinct names are used to identify five different areas of the ocean: Pacific (the largest), Atlantic, Indian, Southern, and Arctic (the smallest). Seawater covers approximately of the planet.
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