Farther north , the Atlantic opens into the Arctic Ocean , which is connected to the Pacific by the Bering Strait , forming a continuous expanse of water . The approximate shape of the World Ocean can for most purposes be treated as constant , although in fact it is not : continental drift continually changes its structure .
Farther north , the Atlantic opens into the Arctic Ocean , which is connected to the Pacific by the Bering Strait : The approximate shape of the World Ocean can for most purposes be treated as constant , although in fact it is not : continental drift continually changes its structure .