A black sea nettle in San Diego Bay.
James Jackson of the <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/8123170@N06">Port of San Diego</a> from San Diego, CA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/portofsandiego/4810172774/">Black Sea Nettles in San Diego Bay</a>