<p>Bat stars like this one found amongst purple urchins in Channel Islands National Marine Sanctuary provide important ecological services in the ocean, cleaning up dead organisms and algae. 
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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/28128848805/">CINMS - Bat Star And Urchins</a>