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Bolinopsis infundibulum

(O.F. Müller, 1776)

Andrey Shpatak Japan Sea. Rudnaya Bay. Bolinopsis infundibulum. Nikon D800+Nikkor 60mm+1,5TC. May 2013.

Message posted on UWphotographers on 01 Jun 2013
Darryl Mayer Another "jelly" from Meanish Pier to ID, if you chaps would oblige... ;-)

João Pedro Silva Beroe? A ctenophore.

David Kipling So is this a cnidarian or one of those "looks like a jelly fish but doesn't sting" things? I love these, with the rainbow colours of the cilia catching the light as they swim.

João Pedro Silva Not a cnidarian, one of the "others". Only seen Beroe once in the Azores and they are quite consistent. Some of the other pelagic ctenophores I've seen simply break up when you try to get them closer.

David Kipling We get quite a few of these, especially further north, always a good reason to hang on the shot for a slightly longer safety stop. Quite mesmerising.

David Kipling http://www.marlin.ac.uk/speciesinformation.php?speciesID=2753

David Kipling Apparently this one is carnivorous and eats other comb jellies, whole!

Marco Faasse Beroe gracilis has no ramifications inside, stays small (4 cm long?) and is slender. B. cucumis can show ramifications inside (vsisble in detail Darryl Mayer ?), grows larger and is less slender. B. gracilis may be a North Sea species. Should look it up.

Darryl Mayer What are "ramifications"? These were fairly large at around 150-200mm long. I hadn't seen them with the "fluting" before.

Darryl Mayer Aha, some of this info explains the half eaten other comb jellies we saw. Some of the Bolinopsis infundibulum comb jellies looked inside out and rather ragged. Many thanks. (think I'm just being lazy asking on here instead of searching myself, but always nice to share).

Marco Faasse Ramifications are like this (click on 'view large'): http://www.accessscience.com/search.aspx?rootID=790845

Marco Faasse According to Greve (1975) B. gracilis grows 30 mm long and B. cucumis 150 mm, so B. gracilis is very unlikely :-)

Message posted on NE Atlantic Cnidaria on 26 Jul 2013
Claire Goodwin There were a lot of these about on our dive in Northern Ireland at the weekend. From Russel's pictoral key (and a quick google) it seems most likely to be Pandea conica but from Russell's notes this seems to have a more southerly distribution (Med and S Atlantic) - although I see Wilfred's site has it in the North Sea. Any opinions?

Penny Martin could it be leuckartiara octona ???

Claire Goodwin sounds probable penny martin - thanks, distribution more likely. I'll have to have a good read of the key for that family.

Darryl Mayer They've been "blooming" in Upper Loch Sunart since the beginning of May, along with huge amounts of Comb Jellies too.

Penny Martin we have had lots of comb jellies too ... mainly bolinopsis infundibulum

Claire Goodwin leuckartiara octona is consensus - thanks!

Wilfried Bay-Nouailhat Hi Claire, I've made some brainstroming today on those little anthomedusae that look so similar. On our photos, I think tentacles are the only distinguishable character that helps to determine which species it could be. I think that yours is Leuckartiara nobilis : tentacles of different size but relatively close from each other as with Pandea conica. But P. conica has tentacles of the same size often grouped together by 3 to 4. Leuckartiara octona seems to have more space between tentacles because of adjacent rudimentray bulbs. As for the other species, Neoturris breviconis and Neoturris pileata, they have a greater number of tentacles.

Claire Goodwin Thanks Wilfried Bay-Nouailhat - I really will have to read the key now.

Andy Horton Which key do you use please?

Claire Goodwin I'm looking at Russel's (1953) 'the medusae of the British Isles' which is available as a free pdf here http://www.mba.ac.uk/nmbl/publications/medusae_1/medusae_1.htm. There may be a more modern one but I haven't come across it.

Andy Horton Thanks a lot. I thought that might be it. I did not know it was available online though.

Message posted on NE Atlantic Cnidaria on 23 May 2013
Animalia (Kingdom)
  Ctenophora (Phylum)
    Tentaculata (Class)
      Cyclocoela (Subclass)
        Lobata (Order)
          Bolinopsidae (Family)
            Bolinopsis (Genus)
              Bolinopsis infundibulum (Species)
Associated Species