The Ishkre Ocean (pronounced ISH-kree) is an ocean on Kishar that covers the southern polar region. Its frigid waters meet those of the Na-Gaesa Ocean and the Mhasmuth Ocean at more northerly latitudes. Much of the Ishkre Ocean is covered by sea ice, though the ice cap grows and contracts with the seasons. Where it reaches the Stormlands it is known as the O'oen ice sheet.
The name of the ocean comes from a word in the language of the Uulam, literally translated to "deep night" but with a meaning more like "black ocean".