How Many Oceans Are There in the World?

Today our question is “How many Oceans Are There in the World? “. There are 5 major oceans in the world. If we contains the ancient oceans there are 19 oceans in the world.

What is Ocean
Ocean : The vast body of salt water that covers almost three fourths of the earth’s surface. Dictionary

Ocean : The whole body of salt water that covers nearly three fourths of the surface of the earth. Merriam

Ocean : An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth’s surface (~3.6×108  km2 ) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.  More than half of this area is over 3,000 meters (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (‰) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ‰. Scientists estimate that 230,000 marine species are currently known, but the total could be up to 10 times that number. Wikipedia

There are five major oceans of the world,

  • Pacific Ocean, which separates Asia and Australia from the Americas
  • Atlantic Ocean, which separates the Americas from Eurasia and Africa
  • Indian Ocean, which washes upon southern Asia and separates Africa and Australia
  • Southern Ocean, which, unlike other oceans, has no landmass separating it from other oceans and is therefore sometimes subsumed as the southern portions of the Pacific, Atlantic, and Indian Oceans, which encircles Antarctica and covers much of the Antarctic
  • Arctic Ocean, sometimes considered a sea of the Atlantic, which covers much of the Arctic and washes upon northern North America and Eurasia

Ancient oceans include:

  • Bridge River Ocean, the ocean between the ancient Insular Islands and North America.
  • Iapetus Ocean, the southern hemisphere ocean between Baltic and Avalonia.
  • Panthalassa, the vast world ocean that surrounded the Pangaea super-continent.
  • Rheic Ocean
  • Slide Mountain Ocean, the ocean between the ancient Intermontane Islands and North America.
  • Tethys Ocean, the ocean between the ancient continents of Gondwana and Laurasia.
  • Khanty Ocean, the ocean between Baltica and Siberia.
  • Mirovia, the ocean that surrounded the Rodinia supercontinent.
  • Paleo-Tethys Ocean, the ocean between Gondwana and the Hunic terranes.
  • Poseidon Ocean
  • Proto-Tethys Ocean
  • Pan-African Ocean, the ocean that surrounded the Pannotia supercontinent.
  • Superocean, the ocean that surrounds a global supercontinent.
  • Ural Ocean, the ocean between Siberia and Baltica.


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  1. Andrew A. Sailer March 8, 2012
  2. bossproking April 16, 2012
    • Adam March 17, 2013
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