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Eubranchus pallidus

(Alder & Hancock, 1842)

Bernard Picton Eubranchus pallidus pale and typical varieties on the same hydroid (Halecium halecinum) with spawn, so probably one species.... (Gulen, Norway, 16/03/2013).

Message posted on NE Atlantic Nudibranchs on 18 Mar 2013
Gary Cobb In regards to Kares post I found this photo that was called Eubranchus pallidus, it pretty well matches Kares externally.

Bernard Picton Yes, Gary Cobb, this is certainly the same species. The original description, by Alder & Hancock, of E. pallidus was a pale animal. Later they found more pigmented ones and tried to change the name to E. picta (means painted). But the rules of nomenclature say that even the author of a name cannot change it after it has been published. It is odd that I've never seen this pale form in the UK so it is possible that we have two species in the area. Alder & Hancock worked mostly in the North Sea, so their fauna would have been more like the Norwegian one than my Irish fauna.

Gary Cobb Nice work Bernard! Thank you.

Message posted on NE Atlantic Nudibranchs on 13 Mar 2013
Paula Lightfoot Is this Eubranchus pallidus?

Tony Gilbert I would agree also.

Jim Anderson Me too

Message posted on NE Atlantic Nudibranchs on 20 Jun 2012
John de Jong Eubranchus pallidus from the Oosterschelde, the Netherlands. Olympus E330 with 50mm macro, +10 diopter. F22.0 with 1/60s and ISO200

Message posted on NE Atlantic Nudibranchs on 18 Jun 2012
Eric van Andel Eubranchus pallidus?? (Netherlands.... July 2011, 4 meters depth)

Christian Skauge Weird one... could be E. pallidus.

Bernard Picton I think so, but... I had one a bit like this once, I have the photos at work, I'll look them out.

Message posted on NE Atlantic Nudibranchs on 05 Feb 2012
Nils Aukan Eubranchus pallidus, by Kristiansund, North sea

Paula Lightfoot Is this a Eubranchus species? From Durham Heritage Coast today.

Terry Griffiths I would say Eubranchus pallidus.

Paula Lightfoot Thank you Terry and Brendan - I was wondering about E. pallidus but the description in the book and the photos I could find online were all more colourful than the one I saw.

Terry Griffiths Paula we get a lot of these in Devon and some with more red on there backs.

Terry Griffiths https://www.facebook.com/photo.php?fbid=10151231442622282&set=a.10151231441747282.442441.686077281&type=1&theater

Paula Lightfoot Just looked on NBN Gateway and realised that I recorded this species in Yorkshire last year - that one was more typical looking with red markings on the back.

Bernard Picton A pale form like this was frequent in Norway last March at the Nudibranch safari. There were only a few "typical" E. pallidus. I found a pale one with a normal one together with spawn on the hydroid Halecium, but until that I was certain the pale ones were a different species. It is possible that we have an undescribed species hidden in this colour range, but as E. farrani is polymorphic (several distinct colour forms) it is likely that that is the situation in E. pallidus as well.

Bernard Picton Terry, you should watch out for this species, it is known from Portugal and as we are getting quite a few species from farther south turning up you could find this one. http://www.seaslugforum.net/showall/eubrline

Message posted on NE Atlantic Nudibranchs on 22 Sep 2013
Mark Farrer Hmmm is this Favorinus pannuceus Blairgowrie-Victoria-Australia 6m-12deg water temp Less than 5mm

Linda Colman Mmmm whatever it is, it's pretty.

Mark Farrer Thanks Linda

Linda Colman Have you checked Neville Coleman's Nudi Encyclopedia?

Mark Farrer Not as yet I was hoping the page experts would help in the ID.

Mario Smid eubranchus pallidus, maybe?

Gary Cobb This is correct Mark. It can't be Eubranchus pallidus that is from the eastern Atlantic/Mediterranean Sea region

Mark Farrer Thanks Garry

Gary Cobb You're quite welcome!

Terry Griffiths One from Scotland.

Helgi Winther Olsen E. pallidus? Similar to the ones I find in the Faroes.

Jim Anderson Eubranchus pallidus - for sure

Tony Gilbert Agreed, E. pallidus.

Message posted on NE Atlantic Nudibranchs on 19 Jul 2012
John de Jong Last weekend in the Netherlands, what's the name of it? 1 1/2 cm long. (Not my picture)

John de Jong Bernard Picton can you take a look at ir? Thnx.

Floor Driessen I'd like to know its name as well: we've seen it last weekend and 'decided' to name it E. pallidus

John de Jong I was thinking on T. amoena, Floor Driessen? E. pallidus has more swollen cerata. Did you dive with Sylvia too?

Floor Driessen I'm wondering if T. amoena has orange to brown speckles around the bases of the cerata on the back? My individuals did! They were much bigger than I would expect T amoena to be. (And besides, they(2) were on the sand..) No, I didn't dive with Sylvia.

Peter H van Bragt Hi John, It's Eubranchus pallidus.

John de Jong Thnx, Peter H van Bragt Need a training ;-)

Message posted on NE Atlantic Nudibranchs on 10 Apr 2012
Ruth Sharratt Is this a nudibranch? If so, looks like some sort of eubranchus, but not sure - any ideas? It's pretty small - found it on my pic of a bootlace worm. That gives some sense of scale of the creature. Thanks, Ruth

George Brown Can I make a light-hearted suggestion? Eubranchus pallidus.

David Kipling It's a wee baby and difficult to be sure, but yes I'd agree it looks like some species of Eubranchus.

Ruth Sharratt Thanks a lot. I was confused by the 'big' sphere on its back - it seems oversized for the nudi.

Message posted on Seasearch North Wales on 30 Aug 2013
Erling Svensen I have a feeling for this one - Eubranchus pallidus - but I am not sure. Could it be E. farrani instead?

Klas Malmberg Aquatilis Looks like a F. bostoniensis but its rhinofores are not annulate so it looks like a F. dubia lacking white pigment patches - very interesting, shall be nice to see what it is!

Christian Skauge Hmm, are you sure this is Eubranchus at all? They usually have more bolbous tentacles. And this would be a very strange color variation! E. pallidus should anyway have pigmentation (often reddish-brown) on the head and back.

Christian Skauge What Klas said :-) F. bostoniensis seems most likely.

Erling Svensen Yes, I agree. I had my first dive this year after having a cold and still not feeling good. My brain do not work properly at all. Sorry. Still a strange colour variation...

Christian Skauge :like:

Erling Svensen ..... and thanks.....

Klas Malmberg Aquatilis Yes a very strange color, I´ve seen this variation but with annulate rhinofores so I think this is a interesting form, mayby someone else has another suggestion...

Brendan Oonk On 23 october 2012 (album) I posted some pics of color variation of F.bostoniensis. One of these looks a lot like your one, BUT has also got the rings on the rhinophores.

Peter H van Bragt Neither E. pallidus or F. bostoniensis, I would say! But I wonder what it is. It doesn' t seem to be one we get on the Dutch coast. What was it length?

Bernard Picton I think Klas could be right with Facelina dubia. If so that would be an incredible range extension, previously no farther north than Lough Hyne in SW Ireland.

Erling Svensen Thanks Bernard and all of you. The length was aprox. 2 cm. Just below my house in Egersund harbour at 8 meters deept. Last night.....

Bernard Picton Usually if there is one, there will be a population; one can't breed on its own. (Actually some nudibranchs may be able to do this, as they have both male and female reproductive systems, but we think they don't normally self-fertilise as that's the route to extinction.) So next time you find one put it in a small pot of ethanol and we'll check the radula and perhaps also the DNA. Nudibranchs are moving north quite fast with climate change in recent years.

Erling Svensen Thanks Bernard. We will meet in March - hope to have one before that.

Christian Skauge Wow, incredible!

João Pedro Silva I wonder how long it'll take for Felimare villafranca to reach those latitudes? :)

Erling Svensen By plane only some houres, by "ballast" water, one day, so?

João Pedro Silva As it has direct development, spreading through ballast is less likely. It's the most common nudibranch here in Portugal.

Message posted on NE Atlantic Nudibranchs on 06 Jan 2013
Klas Malmberg Aquatilis Aeolidia papillosa juvenile style?

Peter H van Bragt Not likely, but I must also say that I have no idea what else it might or could be. Pigmentation looks like Cumanotus beaumonti, but it doesn't seem to have cerata in front of the rhinophores. How small was this slug?

Arne Kuilman Doesn't look like the juveniles I've seen and Peter's seen even more. Would be new to me if I saw this in Dutch water.

Klas Malmberg Aquatilis Slug was 11 mm, Cumanotus has very long and small cerata so I do not think thats right, the pigmentation at the face is why I do think its a Aeolidia but I still think its a strange form. I think it looks like combination of Aeolidia papillosa and Eubranchus pallidus... so any other suggestions?

Message posted on NE Atlantic Nudibranchs on 04 Jul 2013
Kåre Telnes Anyone able to identify this one? From Gulen, the West coast of Norway, this weekend. Water depth 14 meters, approx 15 mm long. F. nobilis?

Richard Yorke I'm no expert, but how about Cuthona rubescens

Steven Melvin Flabellina verrucosa?

Peter H van Bragt the lines of white pigment on the various head tentacles are very much indicative for C. rubescens

Steven Melvin Ah yes I believe you are right. F.verrucosa appears to have more of a white line that runs down the rhinophores, where as C. rubescens it appears more dotted like white pigments

Kåre Telnes Thanks for your replies! Checking my regular sources, I must agree it looks very much like C. rubescens. The only thing is that it seems to lack the red coloration at the base of the cerata, as described by Bernard Picton at http://www.habitas.org.uk/marinelife/ .

Ian Smith Steven Melvin there's an unread offlist message in your messages -click messages in menu on left of this page to see it.

Gary Cobb I think this is Trinchesiaa concinna (Alder & Hancock, 1843)

Terry Griffiths Kare when i left they were still talking about this one and 3 others could be new ones.

Steven Melvin Ian Smith, I do not see any message folders on this page other than my private messages, that has nothing related to this

Bernard Picton This is quite common at Gulen at the moment and Dag Leslie Hansen photographed it in 2010. It is a Eubranchus, quite similar to E. pallidus, but lacking most of the brown spotting. We are not sure if it is a local variant, but typical E. pallidus are here too, so it could be an undescribed species. I'm calling it Eubranchus cf. pallidus.

Kåre Telnes Thanks for the help. I guess I'll not publish the images on www.seawater.no unless anyone at Gulen figures it out. Please, let me know if you do!

Gary Cobb Bernard why do you think this is Eubranchus? This photo has characteristics of Trinchesia concinna.

Bernard Picton Gary, I'm looking at it down a microscope...

Kåre Telnes Did the look in the microscope bring you to any conclusion?

Christian Skauge I think we concluded that this is a variety of Eubranchus pallidus. Bernard came across it mating with a more typical-looking specimen :-)

Bernard Picton Not quite mating, but in compromising circumstances....

Message posted on NE Atlantic Nudibranchs on 12 Mar 2013
Klas Malmberg Aquatilis This is at nudie from Norway, Gulen. Identified as Eubranchus farrani. Do you agree? This form with the white pigment on the head is quite common in Gulen.

João Pedro Silva Not E. farrani, at least not like any of the several variations I've seen. Not sure what it is, though. I'd consider Cuthona sp.

Klas Malmberg Aquatilis Im not convinced myself as you can guess of that this is a E. farrani. It has typical white pigment on the rhinofores and on the tentakles. It also has the scattered white pigment on the cerata that makes it special - but... I dont know what it is! Sometimes it has a couple of red small pigmentdots on the dorsum but its lacking in this picture.

João Pedro Silva If this had red marking I'd go for Cuthona foliata... but I don't see them here.

Brendan Oonk If it would have had red bands on the rhinofores it could be Cuthona amoena.......?

João Pedro Silva Brendan, I think you're right. It could be C. amoena. The brown bands on the rhinophores may be very subtle: http://www.seaslugforum.net/message/22029

Tony Gilbert It does have a similar colouration to Eubranchus pallidus but I think its C.amoena as wel.

Message posted on NE Atlantic Nudibranchs on 11 Jun 2012
Pascal Van Acker have some body pictures of eggs from doto maculata,doto sasiae,eubranchus pallidus and trinchesia foliate

Terry Griffiths Pascal i have some of E. pallidus taken last week

Pascal Van Acker thanks Terry

Brendan Oonk Execpt for the eggs of Cuthona foliata, there are pics of all the eggs of the nudis you mention in the new "Ecological Atlas of marine mollusca of the Netherlands", of which the first copy was presented today...

Message posted on NE Atlantic Nudibranchs on 26 May 2013
Pascal Van Acker I am looking for pictures of eggs, can someone help me;the following snails.eubranchus pallidus, Doto maculata,Doto sasiae and trinchesia foliate

Message posted on NE Atlantic Nudibranchs on 25 May 2012
Becky Hitchin Can someone confirm (or not) this is Cuthona rubescens? Bad photo, I know. Sorry!

Sarah Bowen No, I don't think so; more likely to be a Eubranchus.

Erling Svensen Agree. Eubranchus pallidus.

Becky Hitchin Drat. I just saw the red line on the rhinophores ...

Matthew Green Fiona Crouch?

João Pedro Silva Best to post this on the NE Nudibranchs group.

Klas Malmberg Aquatilis Eubranchus pallidus most likely

David Kipling Isn't it E. pallidum, the painted one?

David Kipling Pallidus, autocorrect...

Becky Hitchin Must stop trying to ID nudibranchs. I always get them utterly wrong.

Message posted on Seasearch Identifications on 25 Jun 2013
Holly Latham Another unknown... Eubranchid nudibranch on Zostera marina at Durgan, Cornwall. Depth is around 4-5m. Size around 5mm. Spotted in August 2011. Anyone have any ideas?

Bernard Picton Holly, I think this is one of the colour forms of Eubranchus pallidus. It is a really odd species in having several very distinct colour forms, which you can find on Obelia on Kelp, all mating randomly together and therefore certainly a single species.

Holly Latham Thanks for the suggestion Bernard. The general comments at the time were 'strange colour morph of something Eubranchid' but as things go that is what it has stayed at since!

David Kipling So what will it be eating if it's climbing over Zostera? Or was it just en route to a meal elsewhere ...

Message posted on NE Atlantic Nudibranchs on 05 Feb 2012
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
              Aeolidida (Infraorder)
                Fionoidea (Superfamily)
                  Eubranchidae (Family)
                    Eubranchus (Genus)
                      Eubranchus pallidus (Species)
Associated Species