< Introduction to Oceanography  
      
Bathymetry/Topography map of the wrold
Approximately 71% of Earth's surface is covered by water. This covering is called the hydrosphere and consists mostly of five principal oceans: the Pacific, Atlantic, Indian, Southern, and Arctic.
 Pacific Ocean Pacific Ocean
 Atlantic Ocean Atlantic Ocean
 Indian Ocean Indian Ocean
 Southern Ocean Southern Ocean
 Arctic Ocean Arctic Ocean
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