SeaWIFS refers to the Sea-viewing Wide Field-of-view Sensor, which is a satellite sensor that can monitor the color of the oceans and send data back to Earth. This page has a collection of scientific and educational resources on ocean color. (Some links are old and no longer work.) Ocean color is important because it helps scientists to understand changes that take place in populations of marine phytoplankton, providing information about the health of the oceans.