Comment from Gary McDonaldI can't give you a positive ID for this photo, it could be an oddly colored Cadlina luteomarginata as you have suggested. I have never seen a specimen colored like this, the ones I have seen have all had relatively large, yellow tipped tubercles on the dorsum. There has been some discussion on the <a href="http://www.seaslugforum.net/display.cfm?id=5163">Sea Slug Forum about the possibility of more than one species of similarly colored animals on the Pacific coast of North America</a>. Taken on 19 November 2008 11:58:34 am Posted 16 years ago Updated 4 months ago