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Biofluorescence seen in colourful fire salamanders for the first time

Fire salamanders give off a blue-green glow under ultraviolet light, which may help attract mates or serve as a warning to predators.

By Michael Dalton

3 June 2026

Salamander glow - Glandular biofluorescence in fire salamanders (Salamandra salamandra): first evidence and ecological implications. Royal Society Open Science

J. Ant?nez Glez (CC BY-NC); Royal Society Open Science

For the first time, fire salamanders (Salamandra salamandra) have been shown to biofluoresce, absorbing and re-emitting light at different wavelengths.

In this instance, 10 fire salamanders in Catalonia, Spain, gave off a blue-green glow after being exposed to ultraviolet light (Royal Society Open Science, ).

This ability had never been recorded in fire salamanders before, despite being a very well-studied species.

The fluorescence, which was produced by secretions from the salamanders’ skin glands, appeared primarily on the side and underside of their bodies.

The researchers behind the work believe that this biofluorescence may help the animals to attract mates, or perhaps even protect themselves from predators.

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