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Under dim blue-violet light, the greeneye fish reveals how it gets its name. Its bulging, upward-looking eyes glow an eerie green.Edie Widder, NOAA Ocean Explorer

By the light of day, a greeneye fish seems ordinary: It has a long, narrow body and a small head topped with large, upward-glancing eyes. But if you cut out the bright lights and turn on a dim blue-violet bulb, those eyes glow with an eerie, green hue. That’s because their lenses are fluorescent, which means they absorb one color of light and emit another.

Scientists are now beginning to understand the advantages this gives the species.

Visit the new Science News for Kids website and read the full story: Fish eyes go green

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