<p>This Spanish shawl nudibranch (Flabellina iodinea), found in Channel Islands National Marine Sanctuary, breathes through the gill-like structures on its back! Its bright orange "fringe" is actually a series of structures called cerata that function primarily as gills. What's your favorite kind of nudibranch? 
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Photo Credit: Claire Fackler/NOAA
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/44124469278@N01">National Marine Sanctuaries</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/onms/27416199230/">CINMS - spanish shawl nudibranch</a>