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

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

Adrian Davies / Woman with sunscreen applied to one side of face, portrait under UV light. 2016. Model released.

Adrian Davies / Moths (Lepidoptera) attracted to UV night left on overnight. Costa Rica.