http://www.medslugs.de/E/Med/Cratena_peregrina/Selection.htm
http://www.marenostrum.org/opistobranquios/cperegrina/cperegri.htm
http://www.seaslugforum.net/showall/cratpere
http://www.unterwasserbilder.de/marin3/schne2/mit040.htm
http://www.unterwasserbilder.de/marin3/schne1/mit426.htm
http://www.medslugs.de/E/Atl-E/Cratena_peregrina/Selection.htm
http://www.scubaportugal.com/UWPhoto/LuisQuinta/Portfolio/Med/2..html
http://www.wttfw.freesurf.fr/biology/biology_liste.php?langue=uk&action=classif#Opistobranchia
http://www.ugr.es/~lstocino/c_peregrina.htm
http://www.nembro.info/uk_cratena_peregrina.html
http://www.nudipixel.net/species/cratena_peregrina/
http://www.facebook.com/media/set/?set=o.374656695905614&type=1
http://hypselodoris.blogspot.pt/2008/08/cratena-peregrina-gmelin-1791.html
http://opistobranquis.info/en/guia/nudibranchia/dexiarchia/aeolidida/cratena-peregrina/