Piotr Naskrecki / Scorpion (Opisthacanthus asper), seen in UV light, Gorongosa National Park, Mozambique

Paul Bertner / Scorpion, seen under UV light, Bilsa Biological Reserve, Ecuador

Juergen Freund / Timelapse of a Scolymia coral (Mussidae) feeding, lit with a UV light, Cairns, North Queensland, Australia.

Paul Bertner / Thick-tailed Scorpion (Tityus sp), under UV light, Sani Lodge, Ecuador

Floris van Breugel / Various fluorescent minerals : 1Willemite, New Jersey, 2: Willemite and Calcite, New Jersey, 3: Fluorite, Ohio, 4: Willemite and Calcite, New Jersey. 5: Fluorite, California. 6: Scheelite, California....

Piotr Naskrecki / Scorpion (Brotheas sp) in defensive posture seen under ultraviolet light, Suriname

Piotr Naskrecki / Thick-tailed Scorpion (Tityus sp) under ultraviolet light, Suriname

Andy Rouse / 2020VISION / Blue Tit (Cyanistes / Parus caeruleus) perched on lichen-covered twig. Wales, UK, February. Did you know? The front of a Blue tit's head glows brightly under UV light, which is used by females to choo...

Juergen Freund / Fluorescent coral viewed under UV light, Misool, Raja Ampat, West Papua, Indonesia, sequence 2/2

Piotr Naskrecki / Scorpion young on the back of their mother, their soft cuticle is not yet reflecting ultraviolet light, Brownsberg Nature Park, Surinam

Ingo Arndt / Emperor Scorpion (Pandinus imperator) photographed under ultraviolet light, Africa

Albert Lleal / Giant Desert Hairy Scorpion (Hadrurus arizonensis) photographed under ultraviolet light showing fluoresence, native to southern North America and northern Mexico