The Earth contains five major oceans. Also, all of major oceans have multiple sub-regional areas.

Also known as the Southern Ocean, the Antarctic Ocean is the forth largest ocean and comprises the southernmost waters of the Earth′s Global Ocean, generally taken to be south of 60° S latitude encircling the continent of Antarctica. This ocean comprises just less than 7 percent of the total ocean surface area, and is larger than only the Arctic Ocean.

The Arctic Ocean is the smallest (5th largest) and shallowest of the world′s five oceanic divisions, comprising about 4 percent of the total ocean surface area. However some oceanographers see it as the northernmost part of the all-encompassing world ocean. This ocean includes the North Pole region and extends south to about 60° N latitude. It is mostly covered by sea ice throughout the year and almost completely in winter.

The Atlantic Ocean is the second largest ocean on Earth and covers abouut 29 percent of all of the water surface area of the Earth.

The Indian Ocean is the third largest ocean on Earth and covers some 20 percent of all of the water surface area of the Earth. The Indian Ocean is bounded by Australia to its East, Africa to the West, Asia to the North and the Antarctic Ocean to the South.

The Pacific Ocean is both the largest and deepest of the earth′s oceans and has the deepest point in the world, the Mariana trench. The Pacific Ocean covers around 46 percent of the Earth′s water surface and its surface is larger than the total land surface of the earth.