http://rfbolland.com/okislugs/gymnceyl.html
http://www.divegallery.com/nudi12pa.htm
http://slugsite.us/bow/phil/ceylonic.html
http://www.divegallery.com/gymno2.htm
http://www.seaslugforum.net/showall/gymnceyl
http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi33.html
http://www.vibrantsea.net/ceylonica25_russells1.html
http://www.medslugs.de/E/Pac/Gymnodoris_ceylonica/Selection.htm
http://www.sea-slug.com/species/umiusi382.htm
http://www.edge-of-reef.com/opistobranchi/doridini/OPIGymnodorisceylonicaen.htm
http://www.wttfw.freesurf.fr/biology/biology_liste.php?langue=uk&action=classif#Opistobranchia
http://www.medslugs.de/E/Ind-NW/Gymnodoris_ceylonica/Selection.htm
http://www.medslugs.de/E/Ind/Gymnodoris_ceylonica/Selection.htm
http://seaslugs.free.fr/nudibranche/a_gymno_ceylonica.htm
http://www.medslugs.de/E/Ind-SW/Gymnodoris_ceylonica/Selection.htm
http://www.underwaterkwaj.com/nudi/gymnodorids/e114.htm
http://www.nudipixel.net/species/gymnodoris_ceylonica/
http://www.medslugs.de/E/Ind-E/Gymnodoris_ceylonica/Selection.htm
http://tahitinudi.jimdo.com/liste-des-espèces/gymnodoris-ceylonica/
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=199
http://slugsite.us/bow2007/nudwk867.htm
http://www.medslugs.de/E/Pac-W/Gymnodoris_ceylonica/Selection.htm
http://slugsite.us/bow2007/nudwk1210.htm