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Hypselodoris obscura

(Stimpson, 1855)

David Ennew H Gary is this Hypselodoris obscura .Hmas Brisbane 14m Last Saturday

Gary Cobb Correct!

Seanna Cronin Hypselodoris obscura, southwest wall, Gold Coast Seaway

Ashley Missen Hi Seanna Cronin - great pic can you send the sighting details to data@nudibase.com - thanks Ash

Seanna Cronin what info do you guys need more than what i've already posted?

Ashley Missen Email through site info, depth, date, count of that species, avg Length. Have a look at the database www.nudibase.com and see how we use the info - cheers and thanks Ash

Gary Cobb 26 species found at Northwest Reef OWI, 08-04-2013, rainy overcast some sun day, surge, 4m vis, 24C water temp. 1st dive/2nd dive. *most species found this outing Aeolidiella alba /2 Ardeadoris aff. averni /1 Bornella anguilla /1 Chromodoris splendida (AU) 1/4 Dermatobranchus cf. primus 1 Dermatobranchus rodmani /1 *Doriprismatica atromarginata 5/5 Flabellina bicolor 1 Glossodoris vespa (AU) 2 Goniobranchus albonares /1 Goniobranchus cf. reticulatus /1 Halgerda albocristata 1 Halgerda aurantiomaculata /1 Halgerda cf. willeyi 1 Hypselodoris jacksoni /3 Hypselodoris obscura (AU) 2/1 Hypselodoris tryoni Phestilla sp. 1 Phyllidia elegans /2 Phyllidiella lizae 1/4 Phyllidiella pustulosa 1/1 Platydoris formosa 1 Protaeolidiella juliae /3 Thuridilla splendens 1 Trinchesia ornata 1 Tritoniopsis alba 1/2

Gary Cobb Species list from our 2 dives 29-03-2013 23 Species found at Ridges, Caloundra. Perfect no wind surface conditions, a bit a swell running, some surge, 26C water temp, 5m viz. 1st dive/2nd dive. *most species found this outing. Chromodoris splendida (AU) /4 Dermatobranchus cf. primus 1/1 Dermatobranchus ornatus 3/4 Doriprismatica atromarginata 1/1 Doto sp.1 /4 Flabellina rubrolineata 1/1 Glossodoris vespa (AU) 1/1 Hexabranchus sanguineus /1 Hypselodoris aff. maculosa 1 Hypselodoris jacksoni 3/2 *Hypselodoris obscura (AU) 6/6 Hypselodoris sagamiensis 1 Hypselodoris tryoni 2 Phyllidia coelestis 1 Phyllidia ocellata 1/1 Phyllidia varicosa 3 Phyllidiella lizae 2 Phyllidiella pustulosa 2 Phyllodesmium magnum 1/1 Pleurobranchus peronii /1 Pteraeolidia ianthina 1 Sagaminopteron ornatum 1/2 Trinchesia sibogae 5/3

Chandy de Wit Came across these three on a dive today, wondering if there is any possible explanation?

Rahul Meh-unpronouncable Hypselodoris infucata and what are the other two?

Chandy de Wit More interested in the behaviour? The others are Mexichromis macropus...

Rahul Meh-unpronouncable Initial guess would be communal feeding, though a simple explanation, there are so many nudis with such specific food sources that this behaviour would be interesting to see food preferance choicing over interspecies behavioural patterns.

Chandy de Wit Perfect explanation, though not sure the contact would be necessary since there was quite a large patch of the substance they were on?

Rahul Meh-unpronouncable Perhaps slime trails would answer that bit as nudi that prey on other nudis use slime trails to lead them to their prey, so perhaps though it isnt a predator prey interaction, the hypselodoris is still gaining some information from the slime trail of the others. That this is just a guess, it may explain the close proximity.

Chandy de Wit Makes sense :) so many questions with Nudibranchs :)

Gary Cobb Groupings happen with the same food source. The Hypselodoris is to be questioned! If the animal is fm Australian waters it won't be H. Infucata it would be H. obscura. And if the gills are triangular it would be H. kanga

Chris Cunnold Hi all, what 's the chance that the Hypselodoris is H.saintvincentius? As this is from West Australia.

Chandy de Wit Sorry it's from SW Western Australia, have been calling it Hypselodoris Saintvincentius ??? Though apparently that is questionable?

Chris Cunnold Really? I'm interested in this development, do you know where to point me for the info? I found this http://web.archive.org/web/20130123090304/http://www.seaslugforum.net/find/hypssain

Chandy de Wit I've been calling it Hyp. saintvincentius forever but it's in "Nudibranchs of the World"....

Chandy de Wit And the pic in Neville Coleman's Encyclopaedia doesn't look like it has any yellow spots, so I'm confused......

Sue Myburgh Good to see they are all coming back.

Gary Cobb Yes after a little closer look you may be right the left animal is Hypselodoris saintvincentius the body and rhinophores match, it would be mic to see the gills. Good catch Chris!

Chandy de Wit

Chandy de Wit Hypselodoris saintvincentius, funny, wasn't woundering this at all at the beginning of this post but when Rahul said infucata I found that I have three publications that are saying the same......

Rahul Meh-unpronouncable The degree of difference is often so minute, its hard to see where one species stops and another begins

Gary Cobb For one thing Hypselodoris saintvincentius has red gills with white specks.

Gary Cobb Here are the gill differences between 3 species that look very similar. Hypselodoris infucata has gills with an outer edge has that has one red line, H. kanga has gills are triangular in cross-section (the outer edge has two red lines) and H. saintvincentius has gills similar to H. infucata but with white specks.

Chris Cunnold That's great Gary , a definitive way to ID them, I'm going to have to go back over my images to check.

Gary Cobb Hypselodoris obscura has the single outer red line too BUT is only found on the east coast of Australia (endemic)

Chandy de Wit Thanks Gary Cobb, pretty sure I've only ever seen saintvincentius, the markings and colours of the others also seem quite distinctively different.

Gary Cobb You're quite welcome!

Jim Anderson My Philippine Nudibranchs website is updated following our recent trip - 92 species added plus many additional images.

Patrik Good Nice work. Makes me to follow up on two of my IDs based on your Gastropteron sp. 2 and Hypselodoris sp. 2 pictures. There seem to be little differences between Gastropteron, Siphopteron and Sagaminopteron. At the moment I can't see why your Hypselodoris sp. 2 can not be a Hypselodoris obscura that we are finding in all sorts of texture and colour variations.

Erwin Koehler I will check the IDs if time permits... I think this one http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/phyllodesmium-crypticum-01.html is Phyllodesmium pinnatum Moore & Gosliner, 2009

Blogie Robillo Nice collection!

Blogie Robillo I do believe this one that you labeled Chromodoris sp. 22 is in fact Glossodoris rufomarginata: http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/chromodoris-sp22-01.html

Erwin Koehler I think this one http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/phyllodesmium-sp2-01.html is Phyllodesmium tuberculatum Moore & Gosliner, 2009

Blogie Robillo This one might not be H. tryoni (but I'm not sure): http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/Hypselodoris%20tryoni-03.html

Christopher Thorn Fantastic!

Jim Anderson Thanks folks - I've corrected and updated the site - please pass on any more mistakes!!

Erwin Koehler the Aegires villosus variant with the black tips is in IPN at page 144 Aegires sp. 4, I am not convinced that they are distinct species.

Erwin Koehler Comment from Dr. Richard C. Willan at NUDIPIXEL: "Atagema ornata and Atagema intecta both relate to the same species and we must use Atagema ornata (instead of Atagema intecta - which is more common in the literature) because it is the older name."

Erwin Koehler This specimen has 5 lobes http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/ceratosoma-trilobatum-01.html it is Ceratosoma tenue

Erwin Koehler This specimen http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/dermatobranchus-sp1-01.html looks like Dermatobranchus pustulosus van Hasselt, 1824

Erwin Koehler Nembrotha yonowae Goethel & Debelius, 1992 has a red margin of the foot similar to N. kubaryana Bergh, 1877, your specimens are undescribed, I guess there are several species with a black background color and red spots

Erwin Koehler Comment from Nathalie Yonow: Phyllidiopsis xishaensis is well known throughout the Indo-Pacific as Phyllidiopsis striata Bergh, 1889. This is a misnomer as Phyllidiopsis striata Bergh, 1889 is a valid species, in the genus Phyllidiella as Phyllidiella striata (Bergh, 1889) [Phyllidiopsis] and clearly different, more similar to Phyllidiella rosans.

Erwin Koehler this species http://www.nudibranch.org/Philippine%20Sea%20Slugs/html/nudibranchs/plocamopherus-imperialis-01.html looks like Plocamopherus ceylonicus (Kelaart, 1858)

Jamie Coote Taken at Tumby Bay jetty. SA depth 5m. I really need to get a good Nudi book. Jeez that sounds BAD.

Ashley Missen Look up www.nudibase.com you can do colour searches

Ashley Missen either a Hypselodoris obscura or a Hypselodoris infucata -- Great shot don't forget to send in with stats - thanks ash

Jayne Jenkins I thought this was a painted hypselodoris - but I am an ameteur at this

Ashley Missen Yep that is the common name for Hypselodoris infucata

Ashley Missen Jamie cna you send it in with stats and I will and it first H infucata in the database - cheers ash

Patrik Good Generation X. Thought I'll share this one too. Gold Coast Seaway; 9/10/2012; 14:01 hrs; Austraeolis ornata; size 30mm; depth 2 metres; 20 degrees water temperature; 2 metres visibility; this was the first branch species for the day. Lots of Hypselodoris obscura, beautiful Dendrodoris denisoni, including a juvenile, a few Mexichromis mariei, Ceratosoma tenue, various Goniobranchus and bubble shells, Siraius nucleola, Hypselodoris jacksoni (exciting), and a tiny Goniodoridella savignyi (new record for me and possibly the dive site).

Deb Aston Not sure if this is a birth defect or damage from something else but I thought I had found a new species but my guess is Hypselodoris obscura (battered). 25mm, 10m deep, Cook Island.

Gary Cobb A soon to be dead Hypselodoris obscura! In really bad shape.

Patrik Good Peaceful cohabitation. A small Hypselodoris obscura (about 25mm) is outmeasuring a fish. Southport QLD, Seaway Nightdive 3/6/2012.

Patrik Good Todays stats from two day dives at Southport Seaway, QLD, Australia (23 degrees, 3 to 25 metres visibility): Chromodoris geometrica (3), Analogium amakusanum (1), Chromodoris albonares (1), Hypselodoris obscura (1), Goniodoridella sp. 1 (10+), Goniodoris aspersa (2). Conditions have improved a bit and there seems to be more food around for nudis. I thought I had found No. 99 but it was probably a baby sea cucumber again. Is there a software around that transfers the old nudi names into the new ones?

Ashley Missen Please email to data@nudibase.com thanks Ash - great stats looking forward to the photos - Cheers and Thanks Ash

Gary Cobb NO!!!!!!

Ashley Missen Why Not Gary

Gary Cobb Because you did not write the code!!

Ashley Missen ME!!! - I thought there would be an app for that

Gary Cobb Yes you data base man!

Patrik Good Stop programing code. Our priority is to get a portable/handheld DNA sampler device for branchers with wireless upload facility into our individual databases possibly with a remote backup onto nudibase :-).

Ashley Missen Did you want a special housing for the underwater DNA Scanner

Ashley Missen Maybe a barcode printer on it too so the next time someone see it we can find it in the database

Patrik Good A scent emitting, nudi attracting housing would do if that's on special at the moment. An intelligent barcode on the nudi should contain camera settings based on the branchers equipment while considering lightening conditions too, if you are at developing such a machine. But the end stage has to be that we all have a DNA mixer, so we can all design our own nudi.

Ashley Missen As you Wish! should be ready by Friday

Deb Aston Boys and their toys!!!!!

Patrik Good Alright, can we have that in pink and purple, please?

Ashley Missen Really!!! Pink and Purple - is that so the nudi can't tell what you are up to - nudi camo??

Patrik Good Maybe that too, but also so that the girls are tempted to playing with our boys toys.

Patrik Good Goniodoridella sp. 1 (http://www.nudibranch.com.au/pages/9667b.htm). 9mm, 3 metres, Seaway SW Wall. Where have all the Hypselodoris obscura, Ceratosoma tenue, Chromodoris daphne/verrieri and the rest of the excessively abundant day-nudis gone? There seems to be no food source, all rotten away during the past few weeks with all fresh water instream. Now, there is one species emerging in surprising numbers and that I rarely spotted before, the Goniodoridella sp. (various sizes 8mm to 18mm). Anyone know what they are eating? Wonder how long it will take for the other nudis to be back again. The photo shows one individual saying hello to another one.

Gary Cobb Nice finds Patrik! Eminem sings....food sources they come and go...

Patrik Good :-) Thank, Gary Cobb. Food sources going for some species obviously means food source coming for other nudi species. Well, maybe the nudis were just missing the queen of the Seaway and decided to go travelling too.

Vishal Bhave Is it wide spread ? as i have specimen here from Ratnagiri !!! :D

Patrik Good Vishal Bhave, it is quite common in South East Australia. I have found it on several occasions on Old Woman Island and Southport Seaway, QLD. I have no idea how widespread they are on a global scale. Maybe some other nudi lovers have more info. Last dive this was the only species I found. Food source for other nudis have recently died with all the rain and temperature is relatively high. This nudi was abundant (more than 15) and probably busy reproducing. It would be interesting to know the reason for their appearance in numbers.

Patrik Good Hi Vishal, just realised that you must be a researcher. Are you planning to do a paper on this species? Where is the diving/collecting done in Ratnagiri? Is that Mirya creek or the open sea?

Patrik Good Scanning the Seaway again for 4 hours yesterday. Due to a lack of boat traffic (don't we love severe weather and coastal flood warnings?) I could safely dive the shallows too. The Goniodoridella sp. 1 are still everywhere (I stopped counting and taking pictures). Still no other nudi to be seen except for a tiny Chromodoris geometrica at a quite unusual spot inside a black sponge. Found a few beaten egg masses too. If anyone is diving the Seaway at night please let me know if things look different.

Vishal Bhave I have collected that in Rockpool, in Ratnagiri.

Patrik Good Just an update on these critters. They are absolutely loving the strange conditions we have at the moment. They have grown physically in size and in numbers. They are everywhere. You can see them stretching out their backflaps - it looks like they are sunbathing - and I think I even spotted two of them reproducing. All the other nudis seem to still be gone (only one egg mass found on a two hour dusk/nightdive), along with their food.

Patrik Good Update on these nudis. They are still around, some in twos but not that many and some don't look healthy any more.

Patrik Good Update on the Goniodoridella sp. at the Seaway. They were abundant, healthy looking and mating again last week. Today, I only found one individual and I can certainly say that they are not as visible any more at the moment. I wonder if their mating had been successful at all. These critters keep surprising me.

Patrik Good Update on the Goniodoridella sp. at the Seaway. They are still around, more visible again, and regularily found in numbers. They are looking healthy and some are quite big. My theory about the wing flapping is definitely falsified. Saw a wing flapping individual and no other individual on the same rock. Some individuals have brown dots on them and some have small white but clearly visible pustules/elevations.

Patrik Good Does anyone have an explanation for this one? It is most probably Hypselodoris obscura. Taken 14/10/2011, Seaway Southport QLD, 3 metres depth, about 50mm, 22 degree water.

Deb Aston Do I have to explain the birds and the bees, although it is a bit different in the nudi world?

Gary Cobb These two Hupselodoris obscura are probably preparing for a sexual encounter! :)

Deb Aston Was that Hup or Hyp?

Patrik Good LOL, they are "Hupseling" in an obscure way then. Hmmm, just looks different to what I normally witness. Are these blue flaps sexual organs (normally they are white and shorter), just the underside or even the inside of some nudi or nudis? I know I should not persist.

Deb Aston I have tagged a pic in the porn album so you can see.

Patrik Good Nightdive Southport Seaway 9/1/2011: Hypselodoris obscura run over by a moray eel. We used to see dozens of H. obscura, now there were only a few around. I stopped counting Chromodoris daphne/C. verrieri's (50+) and Ceratosoma tenue's (20+).

Roy Arthur David Lontoh Did you video this moment as well?

Patrik Good Now that you are asking, that would have been a good idea. Was too busy and am too used to morays. Found 19 or 20 different nudi species that dive - hopefully one or two new one's for this dive site. This night I only got videos of a Aplysia parvulla and Syphonota geographica (piggyback) and the most cryptic animal ever.

Deb Aston It was Hypselodoris obscura day yesterday, counted 28 of them on one dive.

Ashley Missen This picture is a bit obsure(a) Great find Deb - looking forward to seeing the stats - Cheers Ash

Per Lasse Baasch A shot from this morning on the HMAS-Brisbane (Mooloolaba Australia)

Per Lasse Baasch What's the name of these once?

Gary Cobb This is Hypselodoris obscura

Gary Cobb One of the most common species on the Sunshine Coast

Per Lasse Baasch hehe yep,.. found about 20 of them today :)

Gary Cobb ...like flies!

Per Lasse Baasch the colours are like a familiar dive company isn't that funny? Could give it a nickname?!

Bruce Muir dude, you're ALL OVER the internets today :D

Patrik Good Actually, I found 17 opisthobranch species on this dive. Here is the problem ID: Gold Coast Seaway, Australia, depth 2 metres, size 7mm. Any help appreciated. Sorry, no clear photo. But I collected it and it clearly shows black or dark brown rhinophores.

Patrik Good Doublecounted one. Here is the list @ 16/8/2012: Aeolidiella alba (7), Bullina lineata (4), Ceratosoma tenue (1), Elysia ? (1), Goniobranchus albonares (5), Goniobranchus decorus (10), Goniobranchus cf. reticulatus (1), Goniobranchus geometricus (10), Goniodoridella sp. 1 (10), Gymnodoris alba (1), Hydatina physis (1), Hypselodoris obscura (20), Micromelo undulata (1), Noumea simplex, two colour variations (5), Thorunna sp. (2), Trinchesia yamasui (1)

Erwin Koehler I' d like to do a guess on what I see: Elysia sp.

Gary Cobb Because of the quality of the photo I would say Elysia sp. too!

Patrik Good Thank you, Erwin and Gary. Certainly not easy to ID based on this photo.

Deb Aston Not sure if this is a birth defect or damage from something else but I thought I had found a new species but my guess is Hypselodoris obscura (battered). 25mm, 10m deep, Cook Island.

Gary Cobb A soon to be dead Hypselodoris obscura! In really bad shape.

Ashley Missen Hi Everyone Please Remember to send you stats and Photos to data@nudibase.com as well your post here - this way I can add them to the Database and then you can help everyone make it easier to find nudis in your area - this is important as It is the only way we can know what species are where and how many of them - Cheers and Thanks Ash

Ashley Missen Regular stats are great

Frank Wehner Will send the data tonight. ;-)

Ken Thongpila I will send Nelson Bay nudi hunts trip last week soon Ashley :-) Nothing special :-( no new species but good hunts....

Ashley Missen Thanks Ken Thongpila and Frank Wehner - I will keepading as fast as I can - Soon I will have a Data entry form on the Website

Patrik Good Ashley, I have got an issue with my stats. We normally got a few larger species that are almost epidemic at certain times in the dive sites around here (Chromodoris daphne, Ceratosoma tenue, used to be Hypselodoris obscura, Phyllidia's, Chromodoris splendida's, even Sagaminopteron ornatum etc. up north, Gymnodoris alba south). I normally photograph a few ones but then am losing interest as I am trying to find new nudi species and not researching a particular area thoroughly (this wouldn't be possible in our dive site due to environmental conditions anyhow). I know this sounds careless. We find so many different species here in one dive that it doesn't make sense and in my view it isn't feasible for me to count them all. So, if the data are for scientific purposes they won't be useable. Also, sometimes data from different divers in the same dive overlap (but often to a surprisingly low degree). Last night, I saw probably around 300 nudis but only 20 different species (hopefully 5 new ones for the dive site). I think most branchers go for new species and are less concerned about numbers. I am not sure if they share my issue and are overwhelmed with stats at times. So, question: how important are numbers? Should I resort to estimating or would you prefer having only numbers when they are accurate? As I am setting up my stats atm I'll probably have categories of 1, 2-4, 5-10, 20 to about 50, 50+ A similar issue I have got with their size. I normally estimate. We often find Ceratosoma tenue of various sizes. As they are very frequent the size data will be lost. By the way, is photographic evidence absolutely required? I reckon there are nudibranchers out there who don't have a camera available. My photos are sometimes just really bad. So, the question is if I should include those. I am pretty sure I am overwhelming you here, Ash. But I do it rather in the group. I am interested how other branchers are feeling about and handling their stats. And especially, how you want your stats.

Ashley Missen I am happy to get any data and est. on common species is ok as the regularity of the stats will this as the database is not a 100% scientific we can allow for some generalness my philosophy is some data is better than none. For example if someone sends in a photo with min data we can still say that there was at least 1 of that species at that site on that day. Hope this helps. Cheers Ash

Patrik Good Thanks, that helps. What's your preferred picture size, format?

Ashley Missen jpeg 1000 pixels on long side - Cheers and Thanks Ash

Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Euctenidiacea (Suborder)
              Doridacea (Infraorder)
                Doridoidea (Superfamily)
                  Chromodorididae (Family)
                    Hypselodoris (Genus)
                      Hypselodoris obscura (Species)
Associated Species