The Circumpolar Ocean
I think of it as the 'fifth' ocean. There are four official oceans, but, the Circumpolar Ocean of Antarctica can easily be discerned as unique to the others. At any rate if one clicks on this map and enlarges to maximum viewer size, one will note two lines that encircle Antarctica. They are the boundaries to the two 'currents' of this ocean. The outer border is the West Wind Drift and the inner border noted to be a lighter blue line is the East Wind Drift.
