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Eubranchus linensis
Garcia-Gomez, Cervera & Garcia, 1990
Alex Mustard Learned today that Diaphorodoris luteocincta has fluorescent pigments - maybe from its food? None of the other nudibranch species I tried had any response.
Joshua Hallas that's really cool i had no idea they could do that. Did you try it with other Diaphorodoris
Lucas CerCur First notice about this phenomenon in this species.
Alex Mustard No. Didn't try that many species. But will in the future
João Pedro Silva Great! Have tried with Eubranchus linensis but... no result.
Leila CB O.o cool!!
João Pedro Silva Nuno Sá, you have to see this. Let's hope Diaphorodoris luteocincta var alba and D. papillata also do this!
Anders Schouw Of all thenudies I have tried, this is the only one I have found with anny real fluorescence in Norway so far.
Rebecca Johnson Rodgers I have seen reports of this phenomenon in 'Doriprismatica' sedna
Anna Nudi Burn very cool!!
Egidio Trainito I need it...
David Kipling Is this the red or yellow bit that is fluorescing (which would start to address João Pedro's question about var reticulata v var alba)?
João Pedro Silva Apparently it's not the red but part of the yellow margin (but not the whole of it) plus the white line extending towards the tip of the foot.
http://www.flickr.com/photos/jpsilva1971/5718847287/
João Pedro Silva I'll be doing a night dive next friday. Will try to bring an UV light to check.
Alex Mustard I think it is the yellow bit, and some of the white. There wasn't yellow on the tail, but there was fluorescent response there. Here is a white light photo from the same dive site (not the same individual). http://www.amustard.com/images/UK13_am-12618.jpg
Alex Mustard João Pedro, note that my shot is a blue light, rather than UV fluorescence.
João Pedro Silva That's important info, Alex! It would be interesting to know which wavelengths produce best results. As I've never seen D. luteocincta var reticulata here (and if both vars are actually the same species...) I hadn't noticed the yellow band is thinner than in var alba.
Rachel Shucksmith Alex, that looks amazing. Were you just trying specifically on nudi's or were you trying a few different species?
João Pedro Silva Another one of today's finds, the elusive Eubranchus linensis. I've seen it in 2007 once... then in 2009... and twice in 2012, less than one month apart. I'm getting spoiled.
João Pedro Silva Marco Faasse, did you get to see this again?
Richie West Bit baffled by this wee trio, can anyone help? I thought the very dark nudi might be Flabellina pedata but both it and the tiny white processed one look like they are munching on red algae, not hydroids. I have other pics which clearly show the larger one has been eating seaweed. And what about the nudi on the right with orange-tipped processes that looks like it's eating Nemertesia?
Sarah Bowen Orange swollen tips to cerata suggests Eubranchus. Now I look again at the dark one with white tips they look that swollen but pointy Eubranchus sort of shape....
Sarah Bowen That nice Mr Picton says that there's a colour morph of Eubranchus farrani where the normal translucent white can be replaced by a purple-black or tawny orange hue. And they eat Obelia geniculata, which often grows on algae. Sound plausible?
Jennifer Jones I agree Sarah, and congrats to you Richie for a brilliant photo showing different colour morphs!
Richie West Thanks Sarah and Jen. Mystery solved!
Kerry Lewis Wowsers!
João Pedro Silva The dark ones are Eubranchus farrani. The smaller one has the characteristics of Eubranchus linensis (white tips of the oral tentacles and rhinophores) but E. farrani is so variable and the one on the left has also white tips of the rhinophores and oral tentacles... but definitely not a Janolus.
David Kipling Just so I'm clear ... there are three nudis here. [1] Biggest, far left, dark with white tips. [2] Middle sized, right hand side, orange tips. [3] Smallest one near middle/bottom, grey with white tips.
Which are you saying is which João Pedro?
João Pedro Silva [1] and [2] E. farrani; [3] E. linensis OR E. farrani.
João Pedro Silva Check my latest of E. linensis (much more common than E. farrani here):
http://www.flickr.com/photos/jpsilva1971/6919061696/
David Kipling I don't think we've ever had UK records for E linensis (according to NBN and Habitas).
David Kipling To me, [3] has the "feel" of a baby version of [1]. Richie West ... could you post a cropped version so we can see the little one in more detail please?
João Pedro Silva That's why I'm in doubt regarding [3]. I also think it's more likely to be E. farrani. But there are records of E. linensis as far north as The Netherlands.
