A red-clawed crab (<i>Perisesarma bidens</i>) in an aquarium
<a href="//commons.wikimedia.org/w/index.php?title=User:Bj%C3%B6rn_K%C3%B6nig&amp;action=edit&amp;redlink=1" class="new" title="User:Björn König (page does not exist)">Björn König</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>