<p>White abalone, found in Channel Islands National Marine Sanctuary, was the first invertebrate (animal without a backbone) to be listed as endangered. Closely related to snails, this species is most threatened by overfishing. 
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Photo Credit: 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/27040031854/">CINMS-white abalone</a>