http://www.seaslugforum.net/showall/phylwill
http://rfbolland.com/okislugs/phylwill.html
http://rfbolland.com/okislugs/phylwil2.html
http://www.medslugs.de/E/Pac-W/Phyllidia_willani/Selection.htm
http://www.cosmos.ne.jp/~breach/slug%20full/nudi%20full6.html
http://www.cosmos.ne.jp/~breach/slug%20full%205/nudi%20full130.html
http://www.cosmos.ne.jp/~breach/slug%20full%206/nudi%20full151.html
http://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Phyllidia_willani.htm
http://www.nudipixel.net/species/phyllidia_willani/
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=380
http://www.vibrantsea.net/phyllidia3535_anilao2015.htm