the five oceans of the world

#1 Pacific ocean

The Pacific Ocean is the largest and deepest ocean on Earth. It spans 60 million square miles from California to China, 

and in certain regions extends tens of thousands of feet below the surface of the water.

To get a sense of just how immense the Pacific Ocean is, you could put all of Earth's landmasses together, and the Pacific would still be larger.

The name Pacific is a version of pacify or peaceful.

 It was named by the explorer Ferdinand Magellan in 1520 as he sailed through a calm patch of water on the ocean. 

Despite its name, the Pacific is a vast body of water teeming with activity. Much of the ocean is still waiting to be explored, 

but human activities like industrial fishing, deep-sea mining, and fossil-fuel burning are already changing it in significant ways. 

The vast body of water is home to some of the most unique life forms on Earth and contains the deepest reaches known to humankind.

#2 Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about 85,133,000 km2 (32,870,000 sq mi).

It covers approximately 20% of Earth's surface and about 29% of its water surface area. 

It is known to separate the "Old World" of Africa, Europe, and Asia from the "New World" of the Americas in the European perception of the World.

Through its separation of Europe, Africa, and Asia from the Americas, 

the Atlantic Ocean has played a central role in the development of human society, globalization, and the histories of many nations. 

#3 Indian ocean

The Indian Ocean is the third-largest of the world's five oceanic divisions, covering 70,560,000 km2 (27,240,000 sq mi) or 19.8% of the water on Earth's surface.

 It is bounded by Asia to the north, Africa to the west and Australia to the east. 

To the south it is bounded by the Southern Ocean or Antarctica depending on the definition in use.

Along its core, the Indian Ocean has some large marginal or regional seas such as the Arabian Sea, Laccadive Sea, Bay of Bengal and Andaman Sea.

#4 Southern ocean

The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the world ocean, generally taken to be south of 60° S latitude and encircling Antarctica.

With a size of 20,327,000 km2 (7,848,000 sq mi), it is regarded as the second-smallest of the five principal oceanic divisions

smaller than the Pacific, Atlantic, and Indian oceans but larger than the Arctic Ocean.

Since the 1980s, the Southern Ocean has been subject to rapid climate change, which has led to changes in the marine ecosystem.

#5 Arctic Ocean

Arctic Ocean, smallest of the world’s oceans, centering approximately on the North Pole. 

The Arctic Ocean and its marginal seas the Chukchi, East Siberian, Laptev, Kara, Barents, White, Greenland, and Beaufort and, according to some oceanographers, also the Bering and Norwegian are the least-known basins 

and bodies of water in the world ocean as a result of their remoteness, hostile weather, and perennial or seasonal ice cover. 

This is changing, however, because the Arctic may exhibit a strong response to global change and may be capable of initiating dramatic climatic changes 

through alterations induced in the oceanic thermohaline circulation by its cold, 

southward-moving currents or through its effects on the global albedo resulting from changes in its total ice cover.