http://slugsite.us/bow/phil/hoffae.html
http://www.seaslugforum.net/showall/thurhoff
http://rfbolland.com/okislugs/thurhoff.html
http://rfbolland.com/okislugs/thurhof2.html
http://www2.gateway.ne.jp/~coon/slug-20.htm
http://www.umiushi.info/photo_species/photo_splist_eng.php?sopt=0&loc=0000
http://www.medslugs.de/E/Pac-NW/Thuridilla_hoffae/Selection.htm
https://www.vibrantsea.net/hoffae23_anilao16.htm
https://www.Philippine-Sea-Slugs.com/Sacoglossa/Thuridilla_hoffae.htm
http://www.nembro.info/uk_thuridilla_hoffae1.html
http://www.nudibranch.com.au/pages/5954e.htm
http://www.underwaterkwaj.com/nudi/sacoglossans/e247.htm
http://sacoglossa.lifedesks.org/pages/34303
http://www.medslugs.de/E/Pac-W/Thuridilla_hoffae/Selection.htm
http://www.umiushi-zukan.com/eng/list_pic.php?kind_id=80
http://www.medslugs.de/E/Ind-SW/Thuridilla_hoffae/Selection.htm