http://www.seaslugforum.net/showall/gastsp1
http://online.divers.ne.jp/ono/seaslug4/room4-7.html
http://www.seaslugforum.net/showall/gastsp2
http://www.seaslugforum.net/showall/gastsp3
http://www.seaslugforum.net/showall/gastsp4
http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi245.html
http://online.divers.ne.jp/ono/seaslug7/room7-10.html
http://www.medslugs.de/E/Pac-NW/Gastropteron_sp_01/Selection.htm
http://www.medslugs.de/E/Pac-NW/Gastropteron_sp_02/Selection.htm
http://rfbolland.com/okislugs/gast_sp1.html
http://www.seaslugforum.net/showall/gastsp5
http://www.underwaterkwaj.com/nudi/cephalaspideans/e317.htm
http://www.seaslugsofhawaii.com/species/Gastropteron-sp1-a.html
http://www.seaslugsofhawaii.com/species/Gastropteron-sp2-a.html
http://www.nudipixel.net/species/gastropteron_sp/
http://www.nudibranch.org/Sulawesi Sea Slugs/html/sss-sea-slugs.html
http://rfbolland.com/okislugs/gast_sp2.html
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=723
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=26
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=39
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=1743
http://www.umiushi-zukan.com/eng/list_pic.php?ssw=g&kind_id=1744
http://www.nuditahiti.com/liste-des-espèces/gastropteron-sp-1/