Sunflower sea star (Pycnopodia helianthoides), aka Twenty Ray Sea Star.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/72825507@N00">Mike Baird</a> from Morro Bay, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/72825507@N00/3184170736/">Sunflower sea star (Pycnopodia helianthoides) aka Twenty Ray Sea Star, Digital Photo Walk at Montana de Oro's Hazard Reef Tidepools, led by Jerry Kirkhart, 09 Jan. 2009.  25 people attended</a>