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Goniodoris nodosa

(Montagu, 1808)


Tamsyn MAnn Is this a Goniodoris nodosa? I've not seen one before, but got the name from Encyclopedia of Marine Life in Britain website. Still haven't quite got to grips with taking pictures of white things! Wear sunglasses!

Terry Griffiths Yes Tam

David Kipling We normally find small specimens on finger bryozoans and then the adults stalking the reefs for a good ascidian meal.

Message posted on NE Atlantic Nudibranchs on 20 May 2013
David Kipling Some Goniodoris nodosa for Tamsyn MAnn. These were taken yesterday in Pembrokeshire at a Dendrodoa-dominated tide-swept site. Since the adults eat this ascidian there were quite a few specimens tucking in to a good meal!

Message posted on NE Atlantic Nudibranchs on 20 May 2013
John de Jong Glad to find these Goniodoris nodosa again with my +10 diopter mounted on my 50mm lens. Olympus E330, ISO 100, F10.0, 1/100s and Ikelite DS160/161 strobes @Zeelandbrug.

Message posted on NE Atlantic Nudibranchs on 15 Apr 2012
John de Jong My first Goniodoris nodosa @Zeelandbrug yesterday. Shot with 50mm macro and +4 diopter, Olympus E330 and 2x Ikelite DS160/161 strobes.

Rob Maller Nice finding John... haven't got this one yet.

Rob Spray We're seeing these in numbers at the low water shore line at the moment (in North Norfolk). Bonus nerd question - how are you mounting the diopter? Is it on the standard port?

John de Jong Rob Spray I mount it directly on the macro lens, it's not a wet diopter. I think to buy a +10 version, or a +10 wet diopter.....Grtz, John

Rob Spray I was nosey as I want to add my 67mm Inon lenses to the same port :-) I normally use a 1.4x TC - less magnification but very sharp.

Sarah Bowen Interesting to see these so early; my experience is that we've seen plenty late on in the season (end August/September) but not as many at this time of year.

Rob Spray There was a real flush of them during our last diving here too - late November

Message posted on NE Atlantic Nudibranchs on 11 Mar 2012
John de Jong Glad to find these Goniodoris nodosa again with my +10 diopter mounted on my 50mm lens. Olympus E330, ISO 100, F10.0, 1/100s and Ikelite DS160/161 strobes @Zeelandbrug.

Message posted on Underwater Macro Photographers on 15 Apr 2012
David Kipling Adult Goniodoris nodosa eating a Dendrodoa grossularia in Pembrokeshire. I'm used to seeing juveniles on the finger bryozoan Alcyonidium diaphanum, so it is nice to see one having moved on to "adult food" ;)

Kate Lock I am assuming this was also Linney Head??

David Kipling Yes, taken a few minutes before the Aegires. Habitas has them down as eating Dendrodoa.

Message posted on NE Atlantic Nudibranchs on 15 May 2012
Erling Svensen The Goniodoris nodosa have just exploded in Egersund harbour the last 2 weeks. I see a lot of them on the Synoicum pulmonaria. Do anybody of you know if this ascidien is on the diet? I know they eat sea mats and other ascidiens, but this one? I planned diving today, but today there is a snowstorm in South Western Norway, so my car do not want to go anywhere.....

David Kipling Can you tell if they are actually eating the tunicate from your pictures (as opposed to them eating some bryozoan around them)?

Message posted on NE Atlantic Nudibranchs on 05 Feb 2012
Ruth Sharratt Hi Liz, thanks for organising such a good weekend's diving. Thanks for all your hard work, it is much appreciated. I've attached a couple of pics - one was of a friendly? fish (we think butterfish) in pentapora. The other is of the nudibranch goniodoris nodosa. It's not a brilliant pic but (it's the same species as the one I photographed for you Kathryn) however the book says it feeds on Dendrodoa grossularia. This was photographed on the 2nd dive on Sunday, so may affect what we thought the sea squirt was which was covering the boulders and gullies. Paul B, what do you think. I guess it's possible that D. grossularia was there as well.

David Kipling Some of those siphons look quite square in cross section, which is a feature of Polycarpa scuba (which looks quite similar),.

Ruth Sharratt Thanks David, Paul Brazier had said they were Polycarpa scuba. Picton did say that it feeds on ascidians, so it includes polycarpa as well. I'm never sure how fussy these creatures are.

David Kipling I imagine that once you climb inside an ascidian the soft bits probably are all the same to eat!

Paul Brazier Hi Ruth. I notice from habitats.org that there is a picture of the eggs, which are a string, rather than a ribbon, so that may account for the extensive strings of eggs that you saw on the same dive. I also spotted a G nodosa in the adjacent bay.

Liz Morris Hi guys - good tips. I saw loads of Goniodoris nodosa on that second dive Ruth, so think you're right. I'd put these down as Dendrodoa grossularia actually. As I understand from previous squirt courses, any species with 4 oral lobes can appear 'square', including both Dendrodoa and Distomas. These guys look quite stout, more of Dendrodoa than Polycarpa. And I think Distomas would generally be tighter packed and with more stripey siphons. So very tricky. Interesting that David and Paul think Polycarpa - I'll have to look more closely and dig one out nex time. Save your pics and we'll try to go through them on the upcoming ID course and see what the others reckon.

Message posted on Seasearch North Wales on 16 Apr 2012
David Fenwick Snr Here's a closer image of the slug on the egg mass

Bernard Picton I think David Kipling is correct in saying Ancula gibbosa. The spawn coil looks like Goniodoris nodosa, so the position is just a coincidence...

David Fenwick Snr Thanks Bernard and David

Message posted on NE Atlantic Nudibranchs on 13 Feb 2013
Ruth Sharratt Hi Liz, thanks for organising such a good weekend's diving. Thanks for all your hard work, it is much appreciated. I've attached a couple of pics - one was of a friendly? fish (we think butterfish) in pentapora. The other is of the nudibranch goniodoris nodosa. It's not a brilliant pic but (it's the same species as the one I photographed for you Kathryn) however the book says it feeds on Dendrodoa grossularia. This was photographed on the 2nd dive on Sunday, so may affect what we thought the sea squirt was which was covering the boulders and gullies. Paul B, what do you think. I guess it's possible that D. grossularia was there as well.

David Kipling Some of those siphons look quite square in cross section, which is a feature of Polycarpa scuba (which looks quite similar),.

Ruth Sharratt Thanks David, Paul Brazier had said they were Polycarpa scuba. Picton did say that it feeds on ascidians, so it includes polycarpa as well. I'm never sure how fussy these creatures are.

David Kipling I imagine that once you climb inside an ascidian the soft bits probably are all the same to eat!

Paul Brazier Hi Ruth. I notice from habitats.org that there is a picture of the eggs, which are a string, rather than a ribbon, so that may account for the extensive strings of eggs that you saw on the same dive. I also spotted a G nodosa in the adjacent bay.

Liz Morris Hi guys - good tips. I saw loads of Goniodoris nodosa on that second dive Ruth, so think you're right. I'd put these down as Dendrodoa grossularia actually. As I understand from previous squirt courses, any species with 4 oral lobes can appear 'square', including both Dendrodoa and Distomas. These guys look quite stout, more of Dendrodoa than Polycarpa. And I think Distomas would generally be tighter packed and with more stripey siphons. So very tricky. Interesting that David and Paul think Polycarpa - I'll have to look more closely and dig one out nex time. Save your pics and we'll try to go through them on the upcoming ID course and see what the others reckon.

Message posted on Seasearch North Wales on 16 Apr 2012
Anna Nudi Burn SQUISH!! >.< Goniodoris nodosa. Brixham, UK.

Message posted on NE Atlantic Nudibranchs on 05 Jun 2013
Anna Nudi Burn SQUISH!! >.< Goniodoris nodosa (cold water nudibranch species) Devon, UK.

Anna Nudi Burn SQUISH!! >.< Goniodoris nodosa (cold water nudibranch species). Devon, UK.

Message posted on Wetpixel Underwater Photography on 05 Jun 2013
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Euctenidiacea (Suborder)
              Doridacea (Infraorder)
                Onchidoridoidea (Superfamily)
                  Goniodorididae (Family)
                    Goniodoris (Genus)
                      Goniodoris nodosa (Species)
Associated Species