http://slugsite.us/bow/nudiwkps/nudiwk18.html
http://www3.bc.sympatico.ca/kerryw/creature/orange.htm
http://slugsite.us/bow/pacific/tochuina.html
http://diver.ocean.washington.edu/pics/critter/nudibranch4.jpg
this website exists no more:
http://www.biology.ucsc.edu/classes/bio161l/NUDI/ttetraqu.html
http://www.divewhidbey.com/sealife2.htm
http://www.vibrantsea.net/tochuina9_hardy11.html
http://www.seaslugforum.net/showall/tochtetr
http://www.dancing-fish.com/uwphoto/porthardy/image_h.php?key=011004_27
http://www.medslugs.de/E/Pac-NE/Tochuina_gigantea/Selection.htm
http://slugsite.us/bow/nudwk432.htm
http://slugsite.us/bow/nudwk524.htm
http://www.seaotter.com/marine/research/tochuina/tetraquetra/html/tetraquetra.jpg.html
http://smg.photobucket.com/albums/v109/divinman/Nudibranch%20archive/?start=120
http://scottpenny.smugmug.com/gallery/3881249_R9eMK/6
http://www.nudipixel.net/species/tochuina_tetraquetra/
http://marliwakeling.jalbum.net/Nudibranchs/slides/Tochuina tetraquetra.html