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Arctic Ocean
Smallest ocean, covering 15 million sq km (5.8 million sq mi).
Southern Ocean
Encloses Antarctica and is approximately 21 million sq km (8.1 million sq mi) in size.
Indian Ocean
Third largest ocean, covering 70.56 million sq km (27.24 million sq mi).
Atlantic Ocean
Second largest ocean, covering 85.1 million sq km (32.8 million sq mi).