Aplysiopsis nigra (Baba, 1949) [Hermaeina]

http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi29.html
http://www.sea-slug.com/species/umiusi097.htm
http://www.umiushi.info/photo_species/photo_splist_eng.php?sopt=0&loc=0000
http://www.medslugs.de/E/Pac-NW/Aplysiopsis_nigra/Selection.htm
http://www.seaslugforum.net/showall/aplynigr
http://sacoglossa.lifedesks.org/pages/34128
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=537