What Colors do Fish Actually See?

New rainbow-colored fish lives in the ocean's 'twilight zone

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National Aquarium - From a distance, the black durgon appears to be—as its name suggests—black in coloration. This blimp-shaped fish is actually quite vibrant and can change color depending on its surroundings!

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What Colors do Fish Actually See?

It Looks Awkward, but This Fish Has a Secret Glow - The New York Times