http://www.seaslugforum.net/showall/okenstell
http://www.dragonmouse.com.au/diving/nudibase.php?action=nudidetail&id=18
http://slugsite.us/bow2007/nudwk1127.htm
http://www.medslugs.de/E/Ind-NW/Okenia_stellata/Selection.htm