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Visit a Chinese beach on a summer night, and you might catch a glimpse of something spectacular.
Sparkling electric blue waters known as "blue tears."
The dazzling light show is the work of a bioluminescent plankton called Noctiluca scintillans.
Researchers don't know why they glow when disturbed by motion, but they have several theories.
The light could be a way to shock their predators or to lure in the animals that feed on their predators.
As beautiful as they are, it's difficult to know when and where you can see blue tears on any given night.
But researchers have now found a way to track blooms of Noctiluca scintillans from space.
Scientists are now studying satellite images of the blooms to better understand how they move through the ocean.
Researchers could potentially use the information to predict where tourists are likely to see blue tears on a given night.