Sargasso Sea
	Oval region of the North Atlantic Ocean, between the West Indies and the Azores. Although its limits are indefinite, the name Sargasso Sea is most commonly applied to the area between longitude 35° and 70° west and latitude 25° and 32° north. The Sargasso Sea is noted for its large expanses of comparatively still water. This phenomenon is primarily due to the fact that the Gulf Stream and other currents of the North Atlantic Ocean rotate around the margins of this region. Abundant varieties of seaweed plants such as brown gulfweed (Sargassum natans) float on its surface, giving the Sargasso Sea its name.