Glowing fish!

As a scuba diver, I have seen all kinds of colorful fish. I have done a few night dives and seen some amazing things, like giant crabs! But I have never seen glowing fish. Perhaps the light I carried on night dives overpowered their glow. Perhaps it takes special techniques for humans to see the glow? With the help of blue light and special long-pass filters, scientists have uncovered more of the undersea world’s secrets. A study published today describes more than 180 species of marine fishes that glow in different colors and patterns, via a process known as biofluorescence. Scientists already knew that some marine organisms fluoresce, including corals and jellyfish, but this is the first reported evidence of widespread biofluorescence among fishes.
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