<i>Jorunna funebris</i> (Nudibranch) on <i>Haliclona sp.</i> (Sponges)
<a href="//commons.wikimedia.org/wiki/User:Nhobgood" title="User:Nhobgood">Nhobgood</a> Nick Hobgood
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>