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Panthalassa, also known as the Panthalassic or Panthalassan Ocean, (from Greek Ïá¾¶Î½ all and Î¸Î¬Î»Î±ÏÏÎ± sea), was the superocean that surrounded the supercontinent Pangaea. During the PaleozoicâMesozoic transition c. 250 Ma it occupied almost 70% of Earth's surface.
Quick Answer. The Southern Ocean surrounds Antarctica. The International Hydrographic Organization created the Southern Ocean in 2000. This ocean comprises the southern parts of the Atlantic, Pacific and Indian Oceans, and it reaches from the coast of Antarctica to 60 degrees south latitude. The Southern Ocean is the fourth-largest ocean worldwide.