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Some consider the Arctic, Atlantic, Indian, and Pacific to be the world's four oceans. Now, those that side with the number five can add the fifth new ocean and call it the Southern Ocean or the Antarctic Ocean, thanks to the International Hydrographic Organization (IHO).<ref>[https://www.thoughtco.com/the-new-fifth-ocean-1435095 The New Fifth Ocean]</ref>}}

Some consider the Arctic, Atlantic, Indian, and Pacific to be the world's four oceans. Now, those that side with the number five can add the fifth new ocean and call it the Southern Ocean or the Antarctic Ocean, thanks to the International Hydrographic Organization (IHO).<ref>[https://www.thoughtco.com/the-new-fifth-ocean-1435095 The New Fifth Ocean]</ref>}}

[[File:BluewhaleNOAA.jpg|right|200px|thumbnail|[[Blue Whale]]s inhabit the Southern Ocean.]]

[[File:BluewhaleNOAA.jpg|left|200px|thumbnail|[[Blue Whale]]s inhabit the Southern Ocean.]]

The website Windows to the Universe further explains:

The website Windows to the Universe further explains:

{{Cquote|So what makes the Southern Ocean an ocean?

{{Cquote|So what makes the Southern Ocean an ocean?