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Aplysia fasciata

Poiret, 1789


Rob Maller And another creature we can't find in any literature... moves like a nudibranch, but is it one?

Chris Barrett Looks similar to a sea hare

Rob Maller Found it in Marsa Nakari housereef, and was some 2cm in length...

Chris Barrett If you look up images of 'Aplysia,' we get some of those species around Britain. Not quite as colourful, but look very similar

Rob Maller Thx Chris, and also this size?

Sarah Bowen I agree - there's one called Striated sea hare (Stylocheilus striatus) in my Collins guide, and though this one is much redder, it looks like the same animal. If you haven't got it, then the "Coral Reef Guide, Red Sea" by Lieske and Myers is pretty good.

Chris Barrett Aplysia of 2cm would be a juvenile. Unless this species is generally smaller, perhaps it's a juvenile, as the Aplysia here grow fairly large (~10-15cm if I remember rightly)

David Kipling Bill Rudman comments that he once collected a specimen of Stylocheilus striatus that was 6.5cm, but this species is usually smaller. http://www.seaslugforum.net/find/stylstri

João Pedro Silva We have several Aplysia here in Portugal, from the 40cm long and +2kg heavy Aplysia fasciata to the small Aplysia punctata and the even smaller Aplysia parvula, only a few cm long.

Rob Maller Thx all... much appreciated !

David Kipling 2kg?!?!? That's bigger than a 'real' hare! Wow.

Message posted on Seasearch Identifications on 14 Apr 2012
Erling Svensen Anybody that knows these eggs? On a red algae - 10 meters dept, in the harbour of Egersund.

Wilfried Bay-Nouailhat Eggs of Aplysia cf. punctata

Erling Svensen Thanks. Never seen them before.

Bernard Picton You're being cautious there Wilfried, or do you suspect that Aplysia punctata is not a single species in our area? In France you should also have Aplysia fasciata and Aplysia depilans, but in Norway I think just the one Aplysia species. Are the other Aplysia spawn masses any different to these?

Wilfried Bay-Nouailhat Hi Bernard. ALong with the tiny A. parvula, we have 4 Aplysia species in Brittany but I'd prefered be cautious because I didn't check if there were several Aplysia in Norway. Concerning the spawn of the 3 largest ones, all I can say is that more or less compact masses can be seen, maybe depending on the species. As for the colour, eggs of A. depilans and A. fasciata can be white, yellowish or pink or the three colours in the same mass.

Message posted on NE Atlantic Nudibranchs on 03 Mar 2012
Elodie Camprasse Hello Nudibranch Lovers! Could anyone tell me what this creature is? It looked to me like a nudibranch, but if it is, that is the biggest one I have ever seen in my life! (like half a football more or less!). I took this photo on Whale Island, Vietnam this month. I don't have access to good ID books at the moment and I'm dying to know what this was! Could anyone help please?

João Pedro Silva Pleurobranchus weberi http://www.seaslugforum.net/find/pleuwebe

Elodie Camprasse Awesome! Thank you so much Joao! I'm so glad I got an answer! This guy was SO impressive!

João Pedro Silva You're welcome, Elodie. It must be quite large. Within that size range we have in the NE Atlantic three species: the sea hare Aplysia fasciata (up to 40cm long and 2kg weight), the nudibranch Tethys fimbria (up to 30cm long but hard to find) and the very common Felimare picta (previously Hypselodoris picta) which has a record 20cm long specimen collected last year for research.

Elodie Camprasse nice! I had never seen anything that big, even in the NE Atlantic, although I had seen learge sea hare, but I'm guessing this one was about 35 cm in diameter!!!

Lucas CerCur I agree with Joao Pedro. Another matter is if this name is or not a junior synonym of Pleurobranchus forskali. Therevision of the genus Pleurobranchus is another challenge waiting for someone....

Elodie Camprasse thanks for the precision! If I had time, I'd love to work more on that!

Lucas CerCur To work more in which sense? Approaching to the review of the genus?

Elodie Camprasse yeah.. I meant on nudibranchs and taxonomy in general!

Lucas CerCur Ah! OK.

Jean-Philippe Imbert Wonderful and very lucky, I have been teaching on whale island for 10 years and I never saw one that big. can you send this pictures and comment to Michel, the owner of the island. Thank you.

Elodie Camprasse yeah, of course Jean-Philippe; I will! actually he is on the island at the moment. I didn't think about mentioning it to him but I will!

Jean-Philippe Imbert And, please, send him an hello from Gérome, Jean-Phi and Julie !!

Jean-Philippe Imbert You work on the island or just having hollidays as i saw that you are friend with jeremy ?

Elodie Camprasse sure, will do! Yeah, I have been working on the island 'til February!

Jean-Philippe Imbert Enjoy it !! that was me to create it at the beginning of the rainbow divers when we were only jéremy and me !! Long time ago !! lol !

Message posted on NUDIBRANCH LOVERS on 30 Mar 2013
Frans Ricc Not a nudibranch, it looks like a sea hare... Taken in Lembeh (Indonesia) at about 15 m depth. Any clue on the species name? Thanks

João Pedro Silva Aplysia parvula

Frans Ricc Thank you. Is it a juvenile phase?

João Pedro Silva Don't think so. Aplysia parvula is possibly a complex rather than a single species but it doesn't grow much. Here in the Atlantic is doesn't grow over 25mm (compared to the 400mm of the closely related Aplysia fasciata). Tropical specimen are frequently dark with a light line along the edge of the parapodia. http://hypselodoris.blogspot.pt/2013/04/aplysia-parvula-guilding-in-morch-1863.html

Eran Fraenkel Fotografié esto ayer en Bullents (Cale Canyelles). ¿ Puede alguien identificar esta especie? I shot this image yesterday at Bullents (cale canyelles). I was told it's related to the Spanish Dancer but I can't find it in my nudibranch book. Can anyone identify it?

Manuel Martínez Chacón Podría ser una liebre de mar negra (Aplysia fasciata).

Manuel Martínez Chacón http://www.asturnatura.com/especie/aplysia-fasciata.html

Vinicius Padula Aplysia fasciata

Eran Fraenkel ¡Gracias, Manuel! Claro. Nunca he vistolo antes. ¿Hay alguna relación con la baliadora española? Mi parece que no.

Manuel Martínez Chacón Ambos son opistobranquios... la bailarina española es Hexabranchus sanguineus.

Owen Wangensteen No están estrechamente relacionados. Aunque ambos son Opistobranquios, la bailarina es un nudibranquio, mientras las aplysias son Anaspideos (también llamados Aplysiomorfos). Por eso no sale en el libro de nudibranquios.

Eran Fraenkel Me preguntaba, porque en el "Nudibranchs Encyclopedia" de Neville Coleman, todos los miembros de Aplysia se enumeran como nudis, pero los opistobranquios se enumeran como no nudibranquios.

Manuel Martínez Chacón Pues como bien te ha dicho Owen Wangensteen, las aplysias son opistobranquios pero no nudibranquios.

Owen Wangensteen Los Opistobranquios son una clasificación de rango mayor (Normalmente se considera una Infraclase, dentro de la Clase Gasteropodos). Y a ella pertenecen diversos órdenes, entre ellos el Orden Nudibranquios, el Orden Anaspideos, el Orden Sacoglosos, y unos cuantos más...

Naiara Benítez Ybargüengoitia Qué bonito Eran Fraenkel :D

João Pedro Silva Rápidas pistas para ver que Aplysia spp. não são nudibrânquios: - rinóforos tubulares; - concha interna (os nudibrânquios não possuem concha em estado adulto); - herbívoras (os nudibrânquios são carnívoros). Há muitas outras diferenças, nomeadamente na morfologia genital que faz com que o acasalamento seja muito distinto e permita acasalamento simultâneo de mais do que dois indivíduos.

Message posted on Nudibranquios on 30 Sep 2013
Craig De Wit Ok nudilovers.. help needed!!! :-) I have a 14 year old niece who is doing a school project on nudibranchs and she needs support with video footage or such.. would any of you be able to assist? She lives in Brisbane and I am currently out on charter in Milne Bay so cant help her...SOS Craig.

Kristin Anderson Photos I have accessible but all my video isn't Pm if it will help

Craig De Wit Kristin... that may help too.. thanks..will get back to you! :-)

Terry Farr I have a few videos I am happy to give but the quality from this site is much better than anything I have http://slugsite.tierranet.com/

Craig De Wit Thanks for your input Terry Farr..will get her to check and get back to you

Karen Enayati Here you have one of ours video from South Spain. The footage of Hypselodoris picta is quite short, but maybe it is useful. Also to be seen some Nudi eggs ribbons, Aplysia depilans and some lovely Aplysia fasciata swimming. http://www.youtube.com/watch?v=NHnurhWsayY&feature=channel&list=UL

Craig De Wit Thank you very much Karen!!! Wish I could look at it myself however I have very slow interent here. Will pass you comment onto my neice.. again many thanks.

Gary Cobb Talk to Mike Miller of the Slug Site

João Pedro Silva Karen Kienberger, loved the video as it illustrates some of the species we also find here in Portugal. The eggs appearing after the Hypselodoris picta are from Berthellina sp. (most probably Berthellina edwardsii) and not from a nudibranch.

João Pedro Silva Craig De Wit, I don't shoot video but my photos of nudibranchs are here: http://www.flickr.com/photos/jpsilva1971/collections/72157627467298556/

Karen Enayati Thanks João Pedro Silva for the information. Yes, it could be a Berthelina edwardsii, as they are some in this zone. And I am pleased to here, that you liked our video.

Message posted on NUDIBRANCH LOVERS on 30 Apr 2012
João Pedro Silva These may be common but extremely hard to find. That is if you're not willing to take a few sea hare egg masses home, put them on a tray and wait for the nudibranchs to come out. I like things done the hard way so I just look for them and expect to get lucky.

Christian Skauge Technically, sea hares are not really nudibranchs ;-)

João Pedro Silva I know, Christian. Maybe the text was not clear: Favorinus branchialis (a nudibranch) feeds on opistobranch eggs (but also hydroids). Due to their size, the egg masses from sea hares (especially Aplysia depilans and Aplysia fasciata) is more likely to contain Favorinus branchialis. As it's very difficult to find this species, the easiest way is to collect eggs masses from Aplysia sp., bring them home (or to a lab), place them on a tray and wait for the Favorinus branchialis to appear.

Christian Skauge Ahh, sorry, I didnt' catch your meaning! of course you'll get the F. branchialis with the sea hare eggs - that's what they eat! We see the same with F. blianus and A. punctata in Norway. Thanks João :-)

Christian Skauge We do even get the F. branchialis here north - very rare, but sometimes :)

João Pedro Silva I must have seen it no more than ten times, but I never tried collecting sea hare's eggs. I simply found them crawling on the bottom.

Christian Skauge Me neither - that's just too nerdy ha ha :-)

Message posted on NUDIBRANCH LOVERS on 16 Jan 2012
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Anaspidea (Order)
            Aplysioidea (Superfamily)
              Aplysiidae (Family)
                Aplysia (Genus)
                  Aplysia fasciata (Species)
Associated Species