http://www.pictonb.freeserve.co.uk/nudibranchs/dotfra.html
http://www.asterisk.no/~emil/nudibranchia/doto_fragilis.htm
http://www.seaslugforum.net/factsheet.cfm?base=dotofrag
http://www.scottishnudibranchs.co.uk/doto-fragilis.html
http://www.habitas.org.uk/marinelife/species.asp?item=W12790
http://www.seawater.no/fauna/Blotdyr/fragilis.htm