we aren't able to see the swell shark glow with the naked eye. We can only see it when these sharks are placed under a blacklight. But some fish that live in the ocean, including other swell ...

Being sharks, they’re hunters but also potential prey for other species, so glowing in the dark might not seem like a very useful feature, but it actually is. Many fish that live near the bottom ...

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These unique fish have the nickname "iridescent shark catfish," a seemingly ill-suited ... protective layer of slime that gives them a shiny glow. These fish are threatened with habitat ...