Sea Bubble (<i><a href="//commons.wikimedia.org/wiki/Colpomenia_sinuosa" title="Colpomenia sinuosa">Colpomenia sinuosa</a></i>), a brown alga. <a href="//commons.wikimedia.org/wiki/Cabrillo_National_Monument" title="Cabrillo National Monument">Cabrillo National Monument</a> tidepools, San Diego, California, USA. NPS photo, no copyright.
J. McKenna
Unknown date<div style="display: none;">Unknown date</div>
<a rel="nofollow" class="external free" href="http://www.nps.gov/cabr/naturescience/plants.htm?eid=228509&amp;root_aId=525#e_228509">http://www.nps.gov/cabr/naturescience/plants.htm?eid=228509&amp;root_aId=525#e_228509</a>