Why Scorpions Glow in the Dark

Under UV light, almost all species of scorpions glow a bright green color, but why?

A huge thanks to Prof. Carl Kloock for the interview and taking us scorpion hunting at the Panorama Vista Preserve. https://panoramavista.org/

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References:
Zwicky, K. T. (1968). A light response in the tail of Urodacus, a scorpion. Life Sciences, 7(6), 257-262. --https://ve42.co/Zwicky1968

Kloock, C. T. (2005). Aerial insects avoid fluorescing scorpions. Euscorpius, 2005(21), 1-7. -- https://ve42.co/Kloock2005

Gaffin, D. D., Bumm, L. A., Taylor, M. S., Popokina, N. V., & Mann, S. (2012). Scorpion fluorescence and reaction to light. Animal Behaviour, 83(2), 429-436. -- https://ve42.co/Gaffin2012

Kloock, C. T., Kubli, A., & Reynolds, R. (2010). Ultraviolet light detection: a function of scorpion fluorescence. The Journal of Arachnology, 38(3), 441-445. -- https://ve42.co/Kloock2012

Kloock, C. T. (2009). Reducing scorpion fluorescence via prolonged exposure to ultraviolet light. The Journal of Arachnology, 37(3), 368-370. -- https://ve42.co/Kloock2009

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Written by Derek Muller, Emily Zhang, Petr Lebedev
Animation by Ivy Tello
Filmed by Derek Muller and Emily Zhang
Edited by Brian Kim
Additional video supplied by Getty Images
Music from Epidemic Sound https://epidemicsound.com
And "Sneaky Snitch" by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/b…
Produced by Derek Muller, Emily Zhang and Petr Lebedev