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The ocean's cerulean, aquamarine and emerald hues offer more than artistic inspiration—they reveal how sea biology is struggling with climate change. NASA's Sea-viewing Wide Field-of-view Sensor (SeaWiFS) has constantly measured ocean color as an indicator of sea life productivity since the satellite reached orbit in 1997. Combined with ocean temperature data, the observations suggest climate change is playing a big role in negatively altering ocean ecosystems. A new video made from the decade of data illustrates how blooms of phytoplankton, which form the base of the oceanic food chain, are gradually thinning. In the video, purples and blues indicate low concentrations of chlorophyll, which plants and phytoplankton use to gather light energy, whereas yellows, oranges and reds show the highest concentrations