You can see right through this little aquarium fish from Thailand: Its skin is almost completely transparent.
Now, scientists have figured out how this fish — called the ghost catfish — creates its iridescent glow.From our newsroom to your inbox at noon, the latest headlines, stories, opinion and photos from the Toronto Sun.By clicking on the sign up button you consent to receive the above newsletter from Postmedia Network Inc. You may unsubscribe any time by clicking on the unsubscribe link at the bottom of our emails or any newsletter. Postmedia Network Inc.
Other creatures are also iridescent, creating the shimmering rainbow effect where colours shift as you move. Usually, they have shiny outer surfaces that reflect the light — like a hummingbird’s feathers or a butterfly’s wings, explained Arizona State University biologist Ron Rutowski, who was not involved with the research.Article content
Instead, it has tightly packed structures in the muscles that can bend light into rainbow hues, which researchers found after shining different lights and lasers onto its body in the lab. As the ghost catfish swims, those muscles relax and tighten, sending off a glinting range of colours.
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