http://www.seaslugforum.net/showall/halgmale
http://rfbolland.com/okislugs/halgmale.html
http://www.underwaterkwaj.com/nudi/cryptobranchs/e365.htm
http://www.nudipixel.net/species/halgerda_malesso/
http://www.cosmos.ne.jp/~ononini/seaslug_addenda2/add2_10.html
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=1176
http://www.medslugs.de/E/Pac-W/Halgerda_malesso/Selection.htm