http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi86.html
http://www.sea-slug.com/species/umiusi011.htm
http://www.umiushi.info/photo_species/photo_splist_eng.php?sopt=0&loc=0000
http://www.h.do-up.com/home/takayan/takapage80.htm
http://www.seaslugforum.net/showall/dermotom
http://www.medslugs.de/E/Pac-NW/Dermatobranchus_otome/Selection.htm
http://www.nudipixel.net/species/dermatobranchus_otome/
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=616