Scorpions glow under ultraviolet light

Photo courtesy: Pritam B. Debnath

All scorpions fluoresce under ultraviolet light, such as an electric black light or natural moonlight. The blue-green glow comes from a substance found in the hyaline layer, a very thin but super tough coating in a part of the scorpion’s exoskeleton called the cuticle.
Scientists have noticed that, right after a scorpion molts, or sheds its shell, it doesn’t glow until the new cuticle hardens.
Still, scientists don’t know what purpose the fluorescence serves. Some theories:
• It protects scorpions from sunlight.
• It helps them find each other.
• It might confuse their prey.

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