Nereis virens (Neanthes virens, Alitta virens)
Alexander Semenov
CC BY 2.0
originally posted to <a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/a_semenov/3099130614/">The Worm</a>