http://www.rfbolland.com/okislugs/hypsboll.html
http://slugsite.us/bow/nudwk168.htm
http://www.seaslugforum.net/showall/hypsboll
http://www.unterwasserbilder.de/marin3/schne2/phi946.htm
http://www.medslugs.de/E/Pac-W/Hypselodoris_bollandi/Selection.htm
http://www.vibrantsea.net/aureopunctata22_anilao10.html
http://www.vibrantsea.net/bollandi33_anilao13.htm
https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Hypselodoris_bollandi.htm
http://www.vibrantsea.net/bollandi20_anilao25.htm
http://www.cosmos.ne.jp/~ononini/seaslug_addenda4/add4_08.html
http://slugsite.us/bow2007/nudwk743.htm
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=326
https://www.vibrantsea.net/bollandi9030_anilao2019.htm
http://www.medslugs.de/E/Pac-NW/Hypselodoris_bollandi/Selection.htm