SeaWiFS satellite images of ocean color show Earth's sea life struggling in warming oceans. Colors show the different concentrations of chlorophyll, a pigmnet crucial for in plants and other photosyntetic organisms that form the base of the world's food chains: Purples and blues show lowest concentrations, while greens, yellows and reds show increasing concentrations of chlorophyll. Credit: Michael Behrenfeld, Oregon State University/NASA