A Stunning New Blue: Mysterious Origin of the Ribbontail Ray’s Electric Blue Spots Revealed

Bluespotted ribbontail ray. A study on bluespotted ribbontail rays revealed how their skin’s nanostructures create vivid blue colors, useful in camouflage and potentially adaptable for eco-friendly dyes in various applications. Credit: Morgan Bennet Smith

This finding has implications for developing chemical-free coloration technologies, with ongoing research into similar phenomena in other marineScientists have identified the unique nanostructures responsible for the electric blue spots of the bluespotted ribbontail ray , with possible applications for developing chemical-free coloration. The team is also conducting ongoing research into the equally enigmatic blue coloration of the blue shark .

“We discovered that the blue color is produced by unique skin cells, with a stable 3D arrangement of nanoscale spheres containing reflecting nanocrystals ,” says Amar Surapaneni, a postdoc with Mason Dean’s group until recently and now a visiting academic at Trinity College Dublin. “Because the size of the nanostructures and their spacing are a useful multiple of the wavelength of blue light, they tend to reflect blue wavelengths specifically.

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A new blue: Mysterious origin of the ribbontail ray's electric blue spots revealedResearchers have discovered the unique nanostructures responsible for the electric blue spots of the bluespotted ribbontail ray (Taeniura lymma), with possible applications for developing chemical-free coloration. The team is also conducting ongoing research into the equally enigmatic blue coloration of the blue shark (Prionace glauca).
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