http://slugsite.us/bow/nudwk158.htm
http://www.seaslugforum.net/showall/risbimpe
http://www.underwaterkwaj.com/nudi/chromodorids/e367.htm
http://www.underwaterkwaj.com/nudi/hawaii/h148.htm
http://www.seaslugsofhawaii.com/species/Risbecia-imperialis-a.html
http://www.nudipixel.net/species/risbecia_imperialis/
http://tahitinudi.jimdo.com/liste-des-espèces/risbecia-imperialis/
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=677
http://www.medslugs.de/E/Pac/Hypselodoris_imperialis/Selection.htm
http://slugsite.us/bow2007/nudwk1195.htm