<Tr> <Td> World Ocean </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Southern Ocean, also known as the Antarctic Ocean or the Austral Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60 ° S latitude and encircling Antarctica . As such, it is regarded as the fourth - largest of the five principal oceanic divisions: smaller than the Pacific, Atlantic, and Indian Oceans but larger than the Arctic Ocean . This ocean zone is where cold, northward flowing waters from the Antarctic mix with warmer subantarctic waters . </P>

What is the only ocean that does not touch antarctica