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Janolus cristatus

(delle Chiaje, 1841)


Yann Querrec Janolus cristatus of Brittany

Message posted on UWphotographers on 13 Nov 2013
Davide Barzazzi Janolus cristatus Giglio island - Italy Canon Ixus800 - 2 strobes Inon D2000

Greotti Cesare BELLISSIMA FOTO; BRAVISSIMO Davide Barzazzi

Nicoleta Nico wowww........

Yutaka Takizawa Very nice shot.....(^。^)

Message posted on Scubashooters.net on 15 Sep 2013
Roberto Ruggiero Ianolo (Janolus cristatus) - Med Sea July 2013. NIKON D5000 & NIKKOR 60mm F2/8 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Message posted on Scubashooters.net on 07 Aug 2013
Marco Paravella Janolus cristatus- Capo Noli (Savona-Italy)-Nikon D7000 in Subal-2x Sea&Sea 110-iso 100 f 22 1/125- Nikkor 105 Vr

Message posted on Scubashooters.net on 04 May 2013
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105vr, F/14, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Scubashooters Dot Net Lovely!!!!

Message posted on Scubashooters.net on 06 Apr 2013
Raffaele Livornese Janolus cristatus, side details Nikon D90 in Hugyfot housing, Nikkor 105, F/16, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Scubashooters Dot Net Ciao Raffaele... ti chiedo io scusa... la foto mi piace molto, grazie! :)

Yutaka Takizawa Good Shoot(^o^)

Raffaele Livornese Thx Yutaka, grazie Scubashooters... ;)

Scubashooters Dot Net Grazie a te! :)

Message posted on Scubashooters.net on 27 Mar 2013
Pascal Van Acker janolus cristatus

Gary Cobb Please include the location and approximate size:)

Klas Malmberg Aquatilis All time before I have always just seen one Janolus but this weekend it was Janolus cristatus all over the place in Sweden...

Marta Pola Please, collect some in ethanol for me!

Message posted on NE Atlantic Nudibranchs on 29 Jul 2013
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105VR, F/14, 1/250sec. Iso 100, 2 x Inon Z240

Scubashooters Dot Net Very nice Raffaele!!! Thanks!!! :)

Raffaele Livornese Thx to you, Scubashooters... :)

Message posted on Scubashooters.net on 18 Mar 2013
Manolo García Janolus cristatus GRANADA-ESPAÑA

Peter H van Bragt Possibly most present northern location of Janolus cristatus. Photographed 09 aug. 2007 Near Stromsholmen, Norway.

João Pedro Silva They're relatively common here but not during the winter. Sometimes along with other bryozoan feeders: http://www.flickr.com/photos/jpsilva1971/7408961534/

Message posted on NE Atlantic Nudibranchs on 18 Feb 2013
Roberto Ruggiero Ianolo (Janolus cristatus) - Med Sea July 2013. NIKON D5000 & NIKKOR 60mm F2/8 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Erling Svensen Just want to share a picture from yesterday dive. The Janolus cristatus is not common here where I live (SW Norway). So - when I see the nudi I just shout out in my regulator as it may well have been 5 - 7 years since I saw it last time. So I would very much like to go diving today in the sunny, nice weather. So warm today that I was out working in my T-shirt (not good for the Global warming... - but good for my mood)

Christian Skauge Hmm... I need this one :-)

Rudolf Svensen I can sell you an image Christian :-)

Christian Skauge Why don't you sell me a live one? :-D

Erling Svensen I can put one on good whisky and send you - if you want?

Christian Skauge Drink the whiskey Erling - I should come over and see you soon :-)

John de Jong How many do you wanna buy, Christian Skauge ;-) We have plenty, you have to come with the excursion here,......

Rob Spray These are amongst our most common summer slugs in Norfolk

Carissa Shipman Has anyone seen copepods infecting nudis in the N. Atlantic? They have been commonly found on J. fuscus here along the Eastern Pacific coast.

Erling Svensen No, I have never seen this. But I did not know that copepods infected nudies. I have seen them on squat lobserters, fish and animals like that, but never on nudies.

Klas Malmberg Aquatilis I have some pictures with copepods on nudies, pictures from sweden and norway. Im going to search this pictures and post them on facebook.

Klas Malmberg Aquatilis Christian - you should go to väderöarna more often because you can see Janolus quite often there...

Message posted on NE Atlantic Nudibranchs on 26 Feb 2012
Roberto Ruggiero Ianolo (Janolus cristatus) - Med Sea July 2013. NIKON D5000 & NIKKOR 60mm F2/8 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Людмила Влах ОЧЕНЬ КРАСИВОЕ ФОТО!

Roberto Ruggiero Людмила спасибо!

Yutaka Takizawa Very nice shot.....(^。^)

Roberto Ruggiero Thanks a lot Yutaka!!!

Message posted on UWphotographers on 07 Aug 2013
Luigi Paoletti Janolus cristatus, nudibranco Arminide AMP di Tor Paterno, Italy (Rome) Canon G10 f4 1/125 ISO100 Gralmarine torches video 125°

Message posted on UWphotographers on 31 Jul 2013
Shôn Roberts Crystal sea slug - janolus cristatus. Taken in the Menai Straits, Anglesey on the 27-5-12.

George Stoyle Janolus cristatus, Cape Wrath, Scotland.

Bob Whorton Like a bunch of light bulbs :o)

Mike Bartick I live Janolus Nudis, very ornate,,,,the digestive glands inside of the cerata do look like bulbs, Tesla Tubes....

Deb Aston Beautiful!

David Serrano Pues puestos a dedicar, esta pa ti Manuel Martínez Chacón :P, Janolus cristatus, Castro Urdiales

Manuel Martínez Chacón No me piques con los Janolus que tengo un par de ellos interesantes, jejeje.

David Serrano Jijiji

Message posted on Nudibranquios on 17 Nov 2013
Manuel Martínez Chacón Ilustrando una vez más el ejemplo de distintas coloraciones de Janolus cristatus que cita João Pedro Silva, aquí os muestro dos Janolus distintos fotografiados en Tarifa.

María Eugenia Suárez preciosos!

Message posted on Nudibranquios on 29 Sep 2013
Manuel Martínez Chacón Janolus cristatus. Isla de Tarifa.

Alberto CM Que buena foto!

Victor Sanchez Muy chula compañero! Un nudi al que le tengo ganas...

Manuel Martínez Chacón Pues en Tarifa suele ser común en primavera y verano.

Message posted on Nudibranquios on 22 Sep 2013
Manuel Martínez Chacón Janolus cristatus

Message posted on NUDIBRANCH LOVERS on 06 Oct 2013
Javier Ferrando Janolus cristatus Canon S-95 + 2 x Z-240 IV INON - Subsee f/8.0 - 1/400 - ISO 100 Lo Portaló - Cap de Creus www.xavierferrando.com

Message posted on UWphotographers on 13 Jun 2013
Manuel Martínez Chacón Janolus cristatus from Tarifa, Spain.

Message posted on NUDIBRANCH LOVERS on 30 Sep 2013
Roberto Nistri Janolus cristatus. Tor Paterno Marine Park, Lazio, Italy.

Message posted on NUDIBRANCH LOVERS on 16 Sep 2013
Javier Alvarez Lerida Lo prometido es deuda, aquí tenéis al Nudi "Burbuja" Janolus Cristatus, otro chiquitito blanco y un pulpo observandome, tengo mejores imágenes pero son muy largas, hay que cortarlas y ahora no puedo pero más adelante editaremos el video y podréis verlo en HD! Buenas inmersiones a todos!

Javier Alvarez Lerida Por cierto el chiquitito creo que se llama Elysa timida.

Jol Falcés Oh! Que bonitoooooo!

Cesc Villasevil ahí, y tan a mano los 3!!!

Javier Alvarez Lerida Jijiji

Message posted on Nudibranquios on 12 Jan 2013
Roberto Ruggiero Ianolo (Janolus cristatus) - Med Sea July 2013. NIKON D5000 & NIKKOR 60mm F2/8 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Yutaka Takizawa Nice shot.....(^.^)

Roberto Ruggiero Thanks :-)

Luis Miguens Hello Roberto Ruggiero, share it here http://skaphandrus.com/en/underwater-photo-contest/FUN-Atlantic and win a Diving Trip to Azores! (flight, hotel, and dives included)

Message posted on UW photo - Fotosub on 07 Aug 2013
Barbara Camassa Janolus Cristatus Fron Croatia

Enrico Pati Strabello!!!

Barbara Camassa stragentile ;)

Marli Wakeling Lovely.

Sven Kahlbrock Very nice shot

Barbara Camassa thanks :)

Umiushi Divermasa Beautiful !!

Azri Win Emb Saidol Flowersb Nudi.. beauty..

Lala Rute Fantastic!!!

Message posted on NUDIBRANCH LOVERS on 11 Apr 2013
Javier Ferrando Canon S-95 - 2 x INON Z-240 IV- Subsee f/8.0 - 1/400 - ISO 100 Janolus cristatus Lo Portaló - Cap de Creus - Costa Brava www.xavierferrando.com

Marcel Alveri Adis is it glow?

Message posted on UWphotographers on 09 Jun 2013
Valter Carrus Mar Tirreno,Janolus cristatus. sony nex5n 30mm macro 2xflash sea&sea manual 1/160 f13 iso 100

Message posted on UW photo - Fotosub on 16 Jun 2013
Valter Carrus Mar Tirreno,Janolus cristatus. sony nex5n 30mm macro 2xflash sea&sea manual 1/160 f13 iso 100

Message posted on UW photo - Fotosub on 16 Jun 2013
Walter Bassi Italy Janolus Cristatus Olumpus Epl-1,14-42,subseee+5,flash Sea&Sea ys 110alpha and flash Sea&Sea ys02 ISO 100 f/20 1/160

Message posted on NUDIBRANCH LOVERS on 06 Dec 2012
Susana Martins One of the most beautifull nudibranches in Portugal! Janolus cristatus

Message posted on NUDIBRANCH LOVERS on 27 Aug 2012
Rafa Ardijump Cosme Today.... Janolus Cristatus

Rafa Ardijump Cosme Canon s100 subsee inon z240 F8, 1/250, iso 100

Ken Thongpila Oh! Wow! Another fantastic shot Rafa :-) Everything is perfect.... Love it..

Rafa Ardijump Cosme tnx Ken Thongpila

Ethan Yang amazing

Rafa Ardijump Cosme tnx

Karolyn Landat wow!

Jerome Kim Beautiful shot!

Marco Maccarelli great shot!!!

Karine Maurice awesome!

Rafa Ardijump Cosme tnx

Message posted on Underwater Macro Photographers on 06 May 2012
Marco Paravella Janolus cristatus- Capo Noli (Savona-Italy)-Nikon D7000 in Subal-2x Sea&Sea 110-iso 100 f 22 1/125- Nikkor 105 Vr

Marco Paravella Thanks very much friends, bye

Message posted on UW photo - Fotosub on 04 May 2013
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105vr, F/14, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Message posted on UW photo - Fotosub on 06 Apr 2013
Raffaele Livornese Janolus cristatus, side details Nikon D90 in Hugyfot housing, Nikkor 105, F/16, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Leonard Burroni non ti offendere per cio' che ti ho scritto, pesavo che si potesse anche fare critiche costruttive. per me la critica e molto importante e motivo di crescita se tutti mi dicono bravo e basta preferisco non postare ciao scusami

Raffaele Livornese Leonard, io non mi offendo per niente e accetto le critiche, ma la foto non e' sfocata. Non so con cosa scatti tu, ma con il 105mm la PDC e' molto ridotta e con il fuoco sugli occhi il resto e' fuori fuoco. Le foto che ritengo abbiano difetti cosi' banali non le posto affatto, per le altre attendo critiche e giudizi, purche' siano, come tu stesso hai detto, costruttive, e non buttate li'. Avrei capito se mi giudicavi per la composizione, in quanto non c'e' un bello sfondo che facesse da contrasto, ma sulla MAF.....

Yutaka Takizawa Good Shoot(^o^)

Raffaele Livornese Thx Yutaka... :)

Fabio Strazzi Ottimo :)

Raffaele Livornese Grazie Fabio... :)

Message posted on UW photo - Fotosub on 27 Mar 2013
Johny Leffelaer This picture of Janolus cristatus,was taken in Holland(Netherlands),shot comes from my former set-up,Olympus 7070 camera. Settings, s. 1/100 , f 11 , iso 100.

Message posted on Underwater Macro Photographers on 10 Apr 2012
George Stoyle Janolus cristatus, Sula Sgeir, Scotland. Nikon D700, 105mm, Nauticam, Z240, 1/100s, f/32, ISO500

Jean-marie De Bruyn Super!!

Barbara Ferrari BELLISSIMOOOOOOOOOOOOOOOOOOOOOO

Tammy Hauk I love that color!

Mike Bartick Wow, nice shot...I love Janolus....great image...

Barbara Trevisan Beautiful!!!

Jean-marie De Bruyn Colorfull very nice shot!!

George Stoyle thanks everyone

Message posted on Underwater Macro Photographers on 08 Apr 2012
Roberto Nistri Janolus cristatus, Tor Paterno Marine Park, Lazio, Italy

Message posted on Wetpixel Underwater Photography on 20 Sep 2013
Yiannis Iliopoulos Janolus cristatus Saronic gulf - Greece Nikon coolpix p7100

Message posted on UWphotographers on 10 May 2013
Roberto Ruggiero Ianolo (Janolus cristatus) - Med Sea July 2013. NIKON D5000 & NIKKOR 60mm F2/8 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Message posted on Wetpixel Underwater Photography on 07 Aug 2013
Alberto Altomare janolus cristatus-mediterran sea, secche di tor paterno-nikon colpix p5100, subsee+10, ikelite ds125- t 1/500 f/7.6

Raffaele Livornese Wow, very nice this the capture...i like it!!

Alberto Altomare tnx bro;-)

Jim Dodd Beautiful photo.

Alessandro Diotallevi La "cattura" è recente, Alberto, leggo della lente +10.... Le boe ci sono ancora a Tor Paterno ?

Alberto Altomare 25/04/2010

Walter Bassi wow,macro very nice compliments

Alberto Altomare tnx to all ;-)

Alexander Niedermair woowh nice picture!!

Alessandro Diotallevi Ok, era un'altra lente allora..... :-)

Ken Thongpila Beautiful shot and beautiful nudi Alberto

Mark Farrer Fantastic shot

Alberto Altomare thanks guys, very honored;-)

Message posted on Underwater Macro Photographers on 27 Jan 2012
Ronilački Centar Veliki Bijeli janolus cristatus, croatia, nikon d80, 60mm, f22, 1/60

Michael Lawrence Nicely done, great focus and color rendition.

Ken Thongpila Wow! very beautiful Nudi... Love it and great shot too.

Orietta Rivolta Beautiful...I like nudibranchs.

Ben Sarinda nice Nudibranchs .,,.,

Damian Hofman Great shot, such a nice nudi!

Ashley Missen What A great Nudi Shot. Don't have that one in the database - could you please email through to data@nudibase.com with information on where and when you found this one - Cheers and thanks Ash

Ronilački Centar Veliki Bijeli thanks very much every1, Ashley Missen, this is found in Adratic sea, Croatia, island Lastovo if you need in detail,this year. must say also this is not exactly rare nudi in this area...

Ashley Missen Have a Look at the database - it tracks Nudi's hopefully all over the world - www.nudibase.com - if you can provide lots of data that would be great - thanks Ash

Ronilački Centar Veliki Bijeli ok sure

Ashley Missen Thanks

Message posted on Underwater Macro Photographers on 25 Nov 2011
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105vr, F/14, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Message posted on UWphotographers on 06 Apr 2013
Javier Ferrando Janolus cristatus Canon S-95 + 2 x Z-240 IV INON - Subsee f/8.0 - 1/400 - ISO 100 Lo Portaló - Cap de Creus www.xavierferrando.com

Dirk Vermeiren Beautifull Javier ;-)

Message posted on Wetpixel Underwater Photography on 13 Jun 2013
Javier Ferrando Canon S-95 - 2 x INON Z-240 IV- Subsee f/8.0 - 1/400 - ISO 100 Janolus cristatus Lo Portaló - Cap de Creus - Costa Brava www.xavierferrando.com

Message posted on Wetpixel Underwater Photography on 09 Jun 2013
Raffaele Livornese Janolus cristatus, side details Nikon D90 in Hugyfot housing, Nikkor 105, F/16, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Jack de Vries Great shot Raffaele Livornese =D

Yutaka Takizawa Good Shoot(^o^)

Raffaele Livornese Thanks, Jack and Yutaka... :-D

Message posted on UWphotographers on 27 Mar 2013
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105VR, F/14, 1/250sec. Iso 100, 2 x Inon Z240

Yutaka Takizawa Good Shoot\(^o^)/

Raffaele Livornese Thx Yutaka.... :)

Message posted on UWphotographers on 18 Mar 2013
Marco Paravella Janolus cristatus- Capo Noli (Savona-Italy)-Nikon D7000 in Subal-2x Sea&Sea 110-iso 100 f 22 1/125- Nikkor 105 Vr

Message posted on Wetpixel Underwater Photography on 04 May 2013
Raffaele Livornese Janolus cristatus Nikon D90 in Hugyfot housing, Nikkor 105vr, F/14, 1/250 sec., Iso 100, 2 x Inon Z240, Subsee +10

Lala Rute Very nice! Nudi flames!

Raffaele Livornese Thx Lala... :)

Message posted on Wetpixel Underwater Photography on 06 Apr 2013
Manolo García Janolus cristatus en La Herradura Nikon D7000 en Nauticam 105mm ISO100 f/40 1/200s

Message posted on Wetpixel Underwater Photography on 24 Mar 2013
Francesco Pacienza Janolus cristatus Palmi (RC) - Italy Nikon D90 - 1 SB105 - Snoot selfmade 1/200s f/36.0 ISO200 60mm © 2012 Francesco Pacienza - Tutti i diritti sono riservati - All rights reserved - Vietata la riproduzione anche parziale senza l'autorizzazione dell'Autore - Permessa la condivisione senza alcuna rimozione del Copyright.

Ilse Merz nice!

Francesco Pacienza Thank you, Ilse Merz

Zanetti Martina waaaeee ...so nice and specialll.... ^_^

Francesco Pacienza Thank you, Martina Zanetti

Message posted on UWphotographers on 04 Feb 2013
Maurizio Pasi Janolus Cristatus Olympus E-PL2 - 45mm macro - 2 Sea&Sea YS-D1 ISO 200 - f8 - 1/180th

Karine Blot <3

Ilse Merz beautiful!

Maurizio Pasi Thanks Karine and Ilse ! :-)

Message posted on UWphotographers on 26 Nov 2012
Susana Martins I have been looking for for this nudibranch for a long time... Yesterday I found it! Janolus cristatus

O Gajo Dos Olivais Great finding Sus! Size?

Susana Martins Maybe 2 or 3 cm. It was big ;-)

Message posted on UWphotographers on 27 Aug 2012
Jose Maria Abad Ortega Janolus cristatus La Herradura Spain Nikon D200 in Sea Sea Sigma 105 Inon Z240X2 F:45 1/80

Message posted on UWphotographers on 25 Jul 2012
Jose Maria Abad Ortega Janolus cristatus La Herradura Granada Spain Nikon D200 Sea Sea Housing 105 mm Nikon SB800 in Sealux Housing F22 1/45

Message posted on UWphotographers on 23 May 2012
Rafa Ardijump Cosme janolus cristatus

Alessandro Pagano Wonderful light and excellent framing. Insect-eye, double exposure, mini-dome or what?

Rafa Ardijump Cosme endoscopic lens for compact cameras inon.

Dario Panzica WOW!!!!

Giorgio Cavallaro Uwp Nice pic!

Kadu Pinheiro Amazing

Michel Carpentier Jolies couleurs !

Message posted on UWphotographers on 12 May 2012
Luis Miguens ID please? From our member: Marc Casanovas http://skaphandrus.com/en/underwater-photography/photo/26391-janolus#.UjrU3tewe0w

João Pedro Silva Janolus cristatus

Message posted on Seasearch Identifications on 19 Sep 2013
Massimo Zannini AMP Portofino...

Ron Silver Janolus cristatus?

Cristina Zunino Uau !!!! I love it

Message posted on Scubashooters.net on 22 Aug 2013
Francesco Turano

Ron Silver Janolus cristatus

Marcel Alveri Adis is it some kind of nudibranch? or something else

Message posted on Scubashooters.net on 04 Jun 2013
Luis Miguens ID please? From our member: Marc Casanovas http://skaphandrus.com/en/underwater-photography/photo/26391-janolus#.UjrU3tewe0w

David Kipling janolus cristatus?

João Pedro Silva Yes, of course. This is unmistakable in this area.

Tamsyn MAnn Not that I'm an expert but I would say Janolus cristatus as above!! :)

Message posted on NE Atlantic Nudibranchs on 19 Sep 2013
Erling Svensen Still som nudies out there. Egersund, Norway today.

Christian Skauge Ahh, Janolus cristatus... Still missing that one! Nice pictures :-)

Erling Svensen What about Aldiza zetlandica?, Christian?

Arne Kuilman Beautiful photos Erling!

Christian Skauge I think I found a zetlandica yesterday, but I'm not sure... Ran out of battery so I have no image :-)

Arne Kuilman That's weird to read. Cristatus is one of our most common nudibranchs, while the others are much much rarer in the Netherlands or non-existent like the ones on photos 1, 2 and 3.

David Kipling Skomer marine nature reserve do a nudibranch survey every four years ... you should come across Christian, you'll be bored of Janolus by the end of the week!

Erling Svensen When diving Rathlin island there was 100dreds of Janolus....

João Pedro Silva I think the most I've found were 3 or 4 Janolus cristatus during a single dive.

David Kipling We often get 3 or 4 in a single field of view ...

Message posted on NE Atlantic Nudibranchs on 03 Jul 2013
Erling Svensen I am not that sure any more, but still I think Janolus. Here is one....

Peter H van Bragt Hi Erling, check te ceratal content with specimen of Eubranchus, that I'm sure you've caught on camera too. There is a distinct difference. Cheers, Peter H van Bragt I'll try to post a comparisson of these two species later this evening.

Erling Svensen Thanks Peter. Looking forward to your post.

Erling Svensen Hi again, Peter. I have no looked at many pictures. I need to change my meening. You are quite right about the content. In the Jonolus it is smoot, and the Eubranchus have more ragged content. 36 years of diving was not enough, so I will dive like Hell the next years to come ;-)

João Pedro Silva Two more clearly seen characteristics: the characteristic caruncle between the rhinophores; the digestive gland not reaching the tip of the cerata.

George Brown Surely it's Janolus? It's got a caruncle. Lovely photo!

João Pedro Silva No doubt on this one: Janolus cristatus. Caruncle, cerata growing ahead of the rhinophores, and clearly the digestive gland fails to reach the tip of the cerata.

David Kipling I also think these feel more "over-stuffed) with cerata, like they have too many attached to the poor animal underneath. E. farrani has more a feel of fewer cerata, but perhaps bigger. This is one of the "gut" things though, backed by no quantitative morphometric data!

Becky Hitchin Nudi newbie ... what's a caruncle?

João Pedro Silva See that crest between the rhinophores? That's the caruncle.

David Kipling That cocks-comb thingie between the two spiky things at the front. Unique to this species. No idea what it does, if anything.

David Kipling In fact, what *does* the caruncle do? Apart from tell us it's a Janolus of course.

Becky Hitchin Ahhh, ok. Thank you!

George Brown Surely "genus" David. J. hyalinus has one too. It's for ordering drinks across the space-time continuum.

David Kipling Thanks George - I am better informed, if no wiser!

Christian Skauge The purpose of the caruncle is unknown, but it is suggested to serve a sensory or defensive purpose. It might be a gland of some sort. Although I must say I liked George's explanation better :-D

Message posted on NE Atlantic Nudibranchs on 19 Jul 2012
Luis Miguens ID please? From our member: Marc Casanovas http://skaphandrus.com/en/underwater-photography/photo/26391-janolus#.UjrU3tewe0w

Nuno Vasco Rodrigues Janolus cristatus

Sarah Bisho Fab-

Message posted on NUDIBRANCH LOVERS on 19 Sep 2013
Roberto Ruggiero Ianolo (Ianolus cristatus) - Med Sea July 2013. NIKON D5000 in NIMAR Housing, 2 NIMAR PRIMO in TTL mode, 1/200 F8 ISO100.

Ron Silver Janolus cristatus :-D

Message posted on UW photo - Fotosub on 16 Jul 2013
Isabella Maffei "IANI" Nikon D700, Nikon 60mm , Subsea +10 ISO 100, 1/250, F36

Pietro Cremone Bella.. hai usato uno snoot?

Fátima Mar Where did you take this picture?

Isabella Maffei Fátima Mar @ Portofino Area, Ligurian Sea, in a place outside the protected area called "Olivetta".

Isabella Maffei pietro cremone @ grazie pietro, ho usato un solo flash ed un escamotage piuttosto artigianale per creare un effetto snoot ;-)

Nadia Chiesi che donna ingegnosa !! :-)))

Isabella Maffei thanks Nadia :-)

Dennis Corpuz I like this shot Isabella Maffei! Nice! :)

Isabella Maffei thanks Dennis :-)

Claudia Weber-Gebert big LIKE !!!

Isabella Maffei and a big THANKS to you Claudia

Fátima Mar Thanks Isabella, There`s also in the Atlantic this Janolus cristatus. Is beautiful...

Isabella Maffei that's new for me! thanks to you Fatima, now i learn something new

Jean-marie De Bruyn Awesome picture!!

Isabella Maffei thanks Juan :-)

Message posted on Underwater Macro Photographers on 10 Apr 2012
John de Jong I thought it was a parasite on these Janolus cristatus, but it seems to be a juvenile Aeolidia papillosa of 2-3mm. Olympus E330 with 50mm macro and +10 diopter, ISO200, 1/125 and F22.0 and 2x Ikelite DS160-161 strobes. At Zeelandbrug, Oosterschelde, the Netherlands.

Message posted on NE Atlantic Nudibranchs on 22 Jul 2012
Arie Vreugdenhil Janolus hyalinus with a copepod at 14m in De Oosterschelde The Netherlands. Animal was about 15-20 mm

Arie Vreugdenhil Peter H van Bragt Is this a juvenile specimen, having such small and few cerata?

Ian Smith http://www.conchsoc.org/node/5265

Arie Vreugdenhil Thanks Ian Smith!

Ian Smith The 15mm specimen I've uploaded has well developed cerata. I guess Arie's is starved, sapped by the copepod or in poor condition for some other reason.

Aldo Brunetti I am a student of the University Autonoma of Madrid, department of zoology. I am writing to you because I am working on the family Janolidae. At the present time, in the department of zoology, we only have Janolus cristatus and I would like to know if you have any other species for example: Janolus hyalinus. We want to do a new description about this family and for this we need all the species, because we want to study them at the molecular and morphological level.

Aldo Brunetti Thanks for your time.

Message posted on NE Atlantic Nudibranchs on 26 Aug 2012
Mimmo Leonardo Ianolo Bova (RC) - Calabria - Italy Nikon D90, Nikkor 60mm, F32, ISO200, 1/200 Easydive housing, 2x Inon z240

Easydive Fabio Benvenuti BRAVO DOMENICO! COMPLIMENTI

Roberto Ruggiero Bella...

許曉芸 Good photo

Giorgio Cavallaro Uwp (Y)

Fabio Strazzi very good

Robert Coelen Flabellina affinis?

Mimmo Leonardo No it's not Flabellina, it's Janolus cristatus :) look at this: in italian http://it.wikipedia.org/wiki/Janolus_cristatus or in english http://www.marinespecies.org/aphia.php?p=taxdetails&id=140855

Allen Walker Awesome Image!!

Robert Coelen what was the water temperature Mimmo?

Mimmo Leonardo Water temperature was about 19° C, depth was about 20 meters.

Message posted on UWphotographers on 21 Jun 2013
Richard Yorke My pictures from last weekends dives off the Llyn now at http://www.richardy.co.uk/LlynSept2013/index.html

Shôn Roberts There are some really great photos there Richard. I think the photo of the Crystal Sea Slug is superb. (i think thats what it is).

Shôn Roberts Do you mind if I share your album on my facebook page ?

Richard Yorke No Problem at all sharing it. It is not a crystal sea slug, that is Janolus cristatus. If you look at the Eubranchus tricolor you will see that the tips of the cerata have white tips, then an orange band then white again. Compare that with a Janolus eg. http://www.richardy.co.uk/Doune2013/content/130721_103026_E-520_large.html and you will see the difference.

Shôn Roberts Thanks Richard.

Ruth Sharratt Lovely set of pics Richard - well spotted. I've not managed to spot an octopus this year, so I'm really quite jealous.

Ruth Sharratt Plus - A great picture of the eubranchus - you can really see the detail.

David Kipling Curious to see whether you and Liz and Franki thinks the following is a bivalve or an ascidian. It seems a tad bulbous, and has six-fold (hexagonal) symmetry around the siphons - bivalves always seem to be circular siphons. http://www.richardy.co.uk/LlynSept2013/content/130929_085938_E-520_large.html

Liz Morris I think it looks like a squirt to me. Too shallow. It has frilly siphons, and is 'clean between the siphons'. Is it possible its a Molgula? It is too big for M.oculata that Bernard Picton mentioned the other day?

David Kipling The anatomy of a squirt seems to result in geometric-shaped siphons (square, hexagonal or octagonal). I've never seen bivalves with geometric siphons. The frilly bit (the molgulid 'crown') suggests a Molgula (as does the fact it's buried).

Richard Yorke OK, had discussed this already with Liz and I will now make the change :-)

Liz Morris Please note... I didnt start the online discussion :)

Bernard Picton This looks like Molgula oculata. Well done Liz!

Liz Morris Great. We'll get there eventually with these squirts!

David Kipling So is this the one that Okenia aspersa eats Bernard?

Bernard Picton No I think it eats Molgula occulta. I'm also not sure whether Okenia pulchella is a separate valid species and whether Eugyra arenosa is also on their menu.

Wendy Northway great photos Richard

Message posted on Seasearch North Wales on 02 Oct 2013
René Weterings "Janolus cristatus" Found on a divesite relatively far to the east in the Eastern Scheldt, I have never seen one before on this divesite. Probably drifted too far off....

Message posted on NE Atlantic Nudibranchs on 18 Oct 2012
Arne Kuilman Janolus cristatus is abundant now in the Oosterschelde.

Tony Gilbert Good shot Arne. Probably the food sources have increased (Bryozoan, Bugula sp.).

Message posted on NE Atlantic Nudibranchs on 22 Sep 2012
Sylvie Omnès Janolus cristatus - Cap d' Antibes- France - Med sea size 50 mm - depth 16 m - water temp. 20°C I was wondering what it is between the rhinophores; could someone answer , please ?

Sylvie Omnès Got the answer (thanks again Vinicius Padula) : it's a caruncle that seems to have sensorial function ...

Giacomo Giovannini a Janolus cristatus from Rimini , Adriatic Sea (Italy). G10 , f/8 , 1/500" , iso80 , YS110 , +8diop

Message posted on Scubashooters.net on 26 Jan 2013
João Pedro Silva Janolus cristatus. Espécime de coloração laranja. Local: Arrábida, Portugal Spot: Zona de Protecção Total Profundidade: 12m Data: 22-05-2011

Bryan Ritchie Incredible :)

Message posted on Nudibranquios on 29 Sep 2013
João Pedro Silva Janolus cristatus. Espécime "pálido". Uma vez que se alimentam de várias espécies de briozoário, pode estar relacionado com o alimento. Local: Berlengas, Portugal Spot: Furado Grande Profundidade: 8m Data: 16-02-2012

Message posted on Nudibranquios on 29 Sep 2013
Jol Falcés Janolus Cristatus

Message posted on Nudibranquios on 24 Aug 2012
Oriol Domingo Janolus cristatus, a Montirivi - Tossa de Mar Maig 2012

Message posted on Nudibranquios on 25 May 2012
Carlos Fernández-Cid Ramos Janolus Cristatus Galicia.Spain

Message posted on NUDIBRANCH LOVERS on 13 Feb 2012
Sylvie Omnès Hi ! this is my first post on the group ; Janolus cristatus, Med sea, 15M ; could someone tell me what is the part between the rhinophores , please ?

Marlon Delgado Amazing

Vinicius Padula Hi Sylvie Omnès, it is a structure called caruncle which is typical of Janolus species and believed to have a sensorial function.

Sylvie Omnès thanks a lot Vinicius !

Vinicius Padula You are welcome. Amazing species and photos!

Beniamino Usai C'est una joli photo Sylvie, mais ou tu l'a fait exactement?

Sylvie Omnès Bonjour Beniamino Usai; j'ai fait cette photo il y a 2 jours, au Cap d'Antibes, sur la Côte d'Azur , France, à environ 15 m de profondeur ... Hello Beniamino, I took this pic 2 days ago, at the Antibes' Cape, French Riviera, at about 15 meters depth ... ;-)

Message posted on EPAM Nudibranchs on 11 Jul 2013
Gary Gubby ˚͜˚ not seen these before,st abbs,10mtr on rocky bottom covered with brittlestars and plumose anemones

João Pedro Silva I think these are the eggs of an aeolid nudibranch. Determining the species may not be that easy unless you catch them "in the act".

Gary Gubby ˚͜˚ they were found not too far from several aeolidia papillosa nudis

João Pedro Silva And that's a strong suspect. Here it could easily be attributed to Spurilla neapolitana, too, athough this species is more often found spawning intertidally.

Ian Smith I don't think this is A. papillosa spawn which is a tight spiral which is then arranged in a larger spiral. There is a very good image of it on Bernard's online Encyclopedia of Marine life. Yours is a loose single spiral like a spring. It resembles more http://www.conchsoc.org/node/5272 , but I don't think it safe to identify it positively as Janolus. Can you crop in close enough to show the ova? J.hyalinus has few large capsules (many ova hidden within each); only 3 or 4 fit across the width of the string. A. papillosa has many more.

David Kipling Surely the spawn is too big for J hyalinus? Looking at the size of the brittle stars in the background this looks to be a big spawn coil, hence needing something chunky to lay it like A papillosa.

Ian Smith Janolus cristatus grows to a chunky 75mm and has similar form of spawn to J. hyalinus (26mm). I don't think it possible to say exactly what it is, but feel sure it's not A. papillosa.

David Kipling I'm pretty confident Gary's is not J cristatus spawn. His is a long spiral thread, J cristatus is laid out as a zip-zig disc with very visible white balls. I see loads of cristatus spawn in Bugula rich dive sites with loads of adults around (it usually triggers me to look for the adults!). However, I've only ever see hyalinus once and not with spawn, so can't comment on what that looks like. Are you thinking Gary's is cristatus or hyalinus spawn Ian?

David Kipling Here's a link to a classic cristatus spawn spiral for reference: http://www.seaslug.org.uk/nudibranchs/repro.html

Ian Smith David as I said, I don't think its possible to say exactly what it is, but I don't think it's papillosa.

David Kipling So if it's not cristatus or papillosa I wonder what it is? Perhaps it's not a nudibranch, would that be possible?

Ian Smith Discarded noodles from Chinese takeaway.

Ian Smith Maybe Gary will post a close up so we can discern ova capsules.

Gary Gubby ˚͜˚ tried to blow picture up but only distorts the picture,you cannot make out any more detail :-( but many thanks for all the input,i am still new to this identification thing so all help is greatly appreciated

Gary Gubby ˚͜˚ could these be the eggs from Tritonia hombergi,they look very similar,just looking through great british marine animals by Paul Naylor?

David Kipling Was there any dead man's finger in the area Gary?

Gary Gubby ˚͜˚ yes,plenty of them,st abbs is covered in dead mans fingers

Ian Smith Looks like you've done your own id Gary, congrats! Alder and Hancock in their great monograph, published 1845-1855, wrote: "The spawn is deposited in the form of a gelatinous yellowish-white cord, about the thickness of a small whip-cord of great length and very much convoluted." Form and size both fit your image.

Message posted on Seasearch Identifications on 28 Jul 2013
João Pedro Silva Any idea on the culprit? Under 1cm wide. The eggs appear to be quite large. Shot in Berlengas, Portugal, ~8m deep.

Egidio Trainito Janolus cristatus ...

João Pedro Silva Thanks! There are lots of bryozoans in that area and I've seen J. cristatus once in a while there but never seen the spawn. I guess I always expected it to be in a less conspicuous place.

David Kipling This certainly looks like the familiar J cristatus spawn we see in the UK, and it is usually out in a prominent place (usually on the bryozoan they're feeding on).

Bernard Picton I think the other, well-camouflaged, Janolus's might lay the same type of spawn. Check out those bryozoans very carefully, especially if you have Scrupocellaria there.

Ian Smith Janolus hyalinus has more smaller ova across the spawn string width than the picture above, so I'd go with J. cristatus. See http://www.conchsoc.org/node/5272

David Kipling It must be a interesting experience raiding your fridge for a midnight snack Ian!

Ian Smith No prob; food on top shelf, boxes of marine life on the others. You should have heard the scream when a prying lady visitor opened a box with an 8 inch land slug.

João Pedro Silva There's a large tunnel in Berlengas with lots of bryozoans and J. cristatus is often found there but there were no conditions for that on this day.

Ian Smith Just looked up Antiopa (=Janolus) cristata in Alder & Hancock. Spawn illustration (by PH Gosse) fits Joao’s photo; single series of large capsules. Here are some bits of what A&H reported of Gosse’s description: --- transparent gelatinous thread ---- succession of figures of 8 ----- single series of transparent globules --- at first about two thirds filled with opaque white specks in the form of a crescent --- 5 days after deposition, the white specks in the globules had filled the whole interior --- each globule contained more than 60 active little nautiloids " whole spawn mass contained calculated 45,000.

Message posted on NE Atlantic Nudibranchs on 25 Apr 2013
Floor Driessen Janolus? Eubranchus? Unfortunately, I only saw this nudi for couple of seconds. This is the only photo I have. Is it possible to identify this individual without seeing the rhinophores?

Erling Svensen Janolus cristatus, quite sure about that.

Marco Faasse What about Eubranchus farrani?

Erling Svensen What about the size? More than 2,5 cm - then it shoud be the J. cristatus for sure. The Eubranchus only grow to 2 cm. Still I am quite sure about the identifications. Looks like Janolus.

Marco Faasse I'm not sure about E. farrani, but why is it Janolus?

Erling Svensen After 36 years of diving and study of the marine life you just see that this is Janolus. Not a good answere, but the Eubranchus do not look like this. Sorry that I cant say any more about why.......!

Marco Faasse OK

David Kipling Usually easy to tell apart with the little cocks-comb on Janolus. Which you can't see here, sadly ...

Peter H van Bragt Hi Floor, I like this crispy sharp picture. I am pretty sure that we are looking at a specimen of E. farrani. Looking at what I think are the tips of the rhiniphores I do not see any grooves. I don't see any branched tips of the ceratal core, the hepatopancreatic branches (is this correct in English?). These branches are not smooth (as in Janolus) but more ragged as in Eubranchus. You've caught the animal on a hydroid not a Bryozoan. Also I looks to me that this picture was made at Lake Grevelingen where J. cristatus has never been found except for one possible historic observation. E. farrani has been found here more often recently. Is that correct? Too bad the picture doesn't show more of the head region as that would allow a better ID. Cheers Peter H van Bragt

Christian Skauge I believe this to be an Eubranchs farrani. Here's why: It lacks the blue pigment at the very tip of the cerata which is present in J. cristatus; also the digestive gland displays slighty knotted branching which strongly hints at Eubranchus. The digestive glands in J. cristatus look more like a straight, thin and smooth thread that usually branches out just before the pigmentation at the tip. The cerata also tends to be more club-shaped and have rounded tips - and there should be more of them. These cerata have the typical balloon-shape of the Eubranchus as well as the "frosting" before the tip turns all-white, which is common in the E. farrani.

Jim Anderson Eubranchus farrani.

David Kipling What makes you say that Jim? [not that I disagree...]

João Pedro Silva Eubranchus, too. Check the digestive gland inside the cerata: they clearly do not reach the white tip in J. cristatus.

David Kipling Is that another key diagnostic criteria João Pedro, alongside the branching duct that Peter mentions?

João Pedro Silva Yes, David. In Janolus, pigment at the tip of of the cerata is superficial and there are no structures such as cnidosacs. Perhaps the white tips are just mimicking cnidosacs...

O Gajo Dos Olivais I'm with E farrani too as for what I could read about. There is an aquarist site that shows images of these two species and curiously the E farrani one looks a lot like this one :) http://www.advancedaquarist.com/2007/11/aafeature2

Christian Skauge The E. farrani on that site looks more like an E. pallidus to me ;-)

O Gajo Dos Olivais Christian, why?

João Pedro Silva Actually, it looks more like E. linensis.Apparently that photo shows the characteristic white pigment on the edge of the posterior end of the foot: http://www.flickr.com/photos/jpsilva1971/7427811108/

Christian Skauge @ Fernando, because of the red pigment on the back. It could of course be another species like for instance th E. linensis - didn't look at it that closely and that is also a species I am unfamiliar with. But I would say it's not an E. farrani :-)

João Pedro Silva Lucas Cervera and Bernard Picton have some discussion on E. linensis and one of the colour forms of E. farrani (which also shows red/orange blotches on the back): http://www.seaslugforum.net/find/eubrline

O Gajo Dos Olivais I was just reading about that little paragraph on seaslug forum on the red /orange blotches.

Floor Driessen Why isn't the individual on my photo a E pallidus?

João Pedro Silva It may well be, Floor. That would also justify the large size. I'm not familiar with E. pallidus so my posts were mostly meant to clarify the question Eubranchus vs Janolus.

Jim Anderson From my observations of these species in Scotland this can only be E. farrani - the shape of the cerata, swollen etc., the white tips with the slightly transparent tip in some - these are my reasons for ID'ing this.

Tony Gilbert Agree with Jim, E. farrani, perhaps a Scottish colour variation.

Message posted on NE Atlantic Nudibranchs on 19 Jul 2012
Giorgio Russo she was so fat!

Gary Cobb Nudibranchs are actually hermaphrodite!

Giorgio Russo i know, but for me it's a she! :)

Gary Cobb And a beauty she is!

João Pedro Silva It's funny that in spite of being hermafrodites most species have feminine names. Actually, the masculine names are the exception (Janolus, Eubranchus are masculine). I know I've only mentioned the genus but it's easy to see the specific epithet usually agrees on gender (sometimes it's even changed for that reason).

Gary Cobb Hey Joao nice thread and quite true! Do the rules state that when a species is described and named, no one can change it unless they prove it is another species? Genus changes don't change the species name.

Gary Cobb You're referring to genus right? It also seems that most species names are named after men.

João Pedro Silva The species named after men have the possessive form (like Aeolidiella alderi, which translates to "Alder's Aeolidiella") but most have actually attributes in the feminine form (for instance, Jorunna tomentosa, Doriopsilla areolata, Diaphorodoris papillata, etc).

João Pedro Silva Janolus cristatus has the specific epithet in the masculine form to agree with the genus (otherwise it would be "cristata").

Gary Cobb Thanks Joao.

Message posted on NUDIBRANCH LOVERS on 03 Nov 2012
Giacomo Giovannini

Giacomo Giovannini Thanks for the invitation, just a Janolus cristatus from Rimini , Adriatic Sea. G10 , f/8 , 1/500" , iso80 , YS110 , +8diop

Message posted on UW photo - Fotosub on 26 Jan 2013
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
               Dexiarchia (Infraorder)
                Proctonotidae (Family)
                  Janolus (Genus)
                    Janolus cristatus (Species)
Associated Species