The ocean glows with undersea life that makes its own light. Animals have evolved this bioluminescence for camouflage, to find mates or to repel or confuse predators.
Sea Life Color Codes Food to Evade Danger

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An example of bioluminescence: light emitted from a deep sea brittle star (Credit: Sonke Johnsen)

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Deep sea shrimp spew out chemicals that generate light where they mix in the surrounding currents, Credit: Sonke Johnsen

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The Johnson-Sea-Link submersible dives to nearly 1,000 meters. Credit: Sonke Johnsen

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The milky way from boat to show sensitivity of camera used to document sea creatures, Credit: Sonke Johnsen