UV induced fluorescence of an adult scorpion and absence of fluorescence in juvenile scorpions (that are hanging on to mom)
<a href="//commons.wikimedia.org/w/index.php?title=User:Frank.starmer&amp;action=edit&amp;redlink=1" class="new" title="User:Frank.starmer (page does not exist)">Frank.starmer</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>