<i><a href="//commons.wikimedia.org/wiki/Pseudomonacanthus_peroni" title="Pseudomonacanthus peroni">Pseudomonacanthus peroni</a></i> (not <i>Acreichthys tomentosus</i> as the Flickr description states)<br>Seagrass FileFish
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/steve_childs/">Steve Childs</a> from Lancaster, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/steve_childs/238274238/">Flickr</a>