http://slugsite.us/bow/nudwk229.htm
http://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Marionia_distincta.htm
http://www.medslugs.de/E/Pac-W/Marionia_distincta/Selection.htm
http://www.nudibranch.org/Sulawesi Sea Slugs/html/sss-sea-slugs.html