Purple Octopus - using citizen science to discover marine interactions
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Halgerda brunneomaculata

Carlson & Hoff, 1993


Christian Skauge So here's one I'm having some trouble with... It looks suspiciously like a Halgerda brunneomaculata, the only problem is this was photographed at the Farasan Banks, Saudi Arabia - in the Red Sea. H. brunneomaculata is supposed to have a Pacific distribution only as far as I can find. Can't find anything from the Red Sea supposed to look like this. Any help would be much appreciated :-)

Gary Cobb Yes this is Halgerda brunneomaculata beautiful critter!

Gary Cobb This could be a tramp species to the area.

Christian Skauge Wow, I would consider this a pretty rare find in that case - thanks ;-)

Susannah Erbe Well done Christian - great find over there ;-)

Gary Cobb Yes a freak no doubt! And you're quite welcome.

Gary Cobb Since I am compiling the full species list for the upcoming Indian Ocean/Red Sea App I'll have to add this little beauty to it!

Christian Skauge It was found and photographed at Dohra Island, Farasan Banks, Saudi Arabia, Red Sea at June 22, 2007. Depth 12-15 meters if I recall correctly. Size was about 30 mm I think.

Kati Burg Sorry - only a very small photo - Does anyone know this nudibranch? Photo was taken at Bonbon Beach, Romblon Island, Philippines

Patrik Good Nize - what was its size? :-)

Gary Cobb This is Halgerda brunneomaculata Carlson & Hoff, 1993 Nice find and quite stunning!

Kati Burg Thank you Gary!

Patrik Good Gary and Ash, is it still a requirement in this forum to give size, location and other information in order to get an ID? I think it is courtesy to other members that don't know the species. Give them a chance to learn instead of looking at nice pictures. While everyone can forget to put this information up I think administrators should be polite about it but certainly not encourage and ignore such shortcomings, especially with nudis that are not seen everyday like this one.

Gary Cobb Patrik I have pulled out my hair trying to get all entries with this simple information. You can drag the horse to water but you can't make it drink! Maybe we should delete all new entries without the appropriate info!!

Patrik Good Fair enough, Gary. For anyone interested in its size: according to http://www.seaslugforum.net/find/halgbrun this animal can reach up to 25mm - quite a big one then.

Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Euctenidiacea (Suborder)
              Doridacea (Infraorder)
                Doridoidea (Superfamily)
                  Discodorididae (Family)
                    Halgerda (Genus)
                      Halgerda brunneomaculata (Species)
Associated Species