Video, I know there has to be a down side of them. Probably after they eat one 10 comes out the other end. Missed "Velvet" in title. I guess the true negative is that they have to have a constant menu of flatworms.
<div class="gc_ifarem_title">Blue Velvet Sea Slug Eating a Flatworm - YouTube</div><iframe style="width: 70%; height: 400px; margin-left: auto; margin-right: auto" src="http://www.youtube.com/embed/149yeh-oWUc"></iframe>
<div class="gc_ifarem_title">Blue Velvet Sea Slug Eating a Flatworm - YouTube</div><iframe style="width: 70%; height: 400px; margin-left: auto; margin-right: auto" src="http://www.youtube.com/embed/149yeh-oWUc"></iframe>