Eddies are rotating masses of water in the ocean that typically form along the boundaries of ocean currents. This true color image from the Sea-viewing Wide Field-of-view Sensor shows the green spiral of an eddy in bright blue water. Also notice the sediments suspended in the water along the south coast of Alaska. (Image provided by the SeaWiFS Project, NASA/Goddard Flight Center, and ORBIMAGE) Image courtesy of Exploring Alaska's Seamounts 2002, NOAA/OER.