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Cereus pedunculatus

(Pennant, 1777)

David Fenwick Snr Hope someone here can help wit the ID of this as I'm a little uncertain as what it could be but initially I though Balanophyllia regia as it appears to have a distinct edge to it. The habitat type is in question but the species was found under a rock at low tide in what is likely a saline lagoon at Carnsew Pool, Hayle, Cornwall, 23.03.12. There were many Caryophyllia smithii and small Jewel Anemones with it. Cereus pedunculatus and Sagartiogeton undatus are the most frequent anemones found on the bottoms of stones, the stones are also above a muddy sediment. It's about 5-6mm in diameter. Thanks.

Message posted on NE Atlantic Cnidaria on 03 Apr 2012
Andy Horton 4 June 2012 A rockpooling visit to Worthing Pier on a low (0.4 metres) spring tide produced a surprise Brittlestar as well as some infrequent summer occurences like two large Velvet Swimming Crabs, Necora puber, a handful of small Common Hermit Crabs, Pagurus bernhardus, in winkle shells, a single Common Starfish Asterias rubens, one Dahlia Anemone, Urticina felina, one small Long-legged Spider Crab Macropodia rostrata, and one sub-adult 5-Bearded Rockling, Ciliata mustela. A Greater Pipefish, Syngnathus acus, was rescued from the beak of a Herring Gull. Daisy Anemones, Cereus pedunculatus, were frequently found in chocolate brown hues. Snakelocks Anemones, Anemonia viridis, were common as usual with frequent Beadlet Anemones Actinia equina. Full Rockpooling Report http://www.glaucus.org.uk/LancingBeach2008.htm#4June (This came out like a list: I must be a bit tired.)

David Hill David Hill Andy - went on a Bioblitz on Saturday at Cemlyn Bay (north coast of Anglesey) and today rockpooling at Llanddulas (north Wales coast) - lots of interesting new finds (for me anyway, fairly new to marine life). Cemlyn included Eel, 5-Bearded Rockling, Butterfish, Lobster and Great Scallop - a few pics here www.flickr.com/photos/natureseye/sets/72157630042354134/ and list of species here http://www.cofnod.org.uk/BioBlitz?ID=6 At Llanddullas this afternoon lots of Sea Gooseberries and a few Pipefish, pics to follow.

Andy Horton The Greater Pipefish did not look injured when collected, but I do not think it will survive. The gulls catch these pipefish occasionally and drop them in gardens.

Joe Bater that would have been a great UW macro photography day!

Andy Horton Not so good on the photography front. Pier causes shadows and low light. Capture and return. I hope to get a few shots later. I was terrestrial and the critters were under rocks. More though. The young rockpoolers (8 yo) are well informed now.

David Hill http://www.flickr.com/photos/natureseye/7340913120/

Erling Svensen Pictures from yesterday. This anemone lives very, very exposed, always very shallow (the upper 3 meters), and grows only to 1 cm in diameter. Any suggestions?

Steve McWilliam Can people post locations with pictures please ??

Erling Svensen Norway, South West coast - look at map.

Erling Svensen Dawn, this one is not S. elegans. They are always the same in many locations, very shallow, and very exposed. I add a picture of S. elegans from the same location. They look very different from this one. Also this unknown one has the same colours and do not have the variations as elegans have.

Peter H van Bragt Possibly Cereus pedunculatus!

Erling Svensen The C. pedunculatus has more than 200 tentacles, this one have less than 100. So??? And I never see it bigger than 1 cm - disc diameter.

Chris Wood Certainly a Sagartid anemone of some sort, but not one I recognise from the UK. The closest thing would be Sagartia troglodytes on appearance alone but the habitat is wrong - though it must have got the troglodytes name from some where so perhaps it can occur in shallow surgy and cave habitats as well as in areas with sediment, which is where we usually find it.

Chris Wood Of course the number of tentacles in a small specimen can be misleading as they can add rows as the grow. Mind you it doesn't look like Cereus as we see it either and again the habitat is all worng.

Marco Faasse I don't know what species this is. But bear in mind that: Sagartia ornata is a small Sagartia species (base max 15 mm) with much less variable colours than S. troglodytes and S elegans, usually shades of green or brown, and able to withstand much more lowering of salinity than either of the other Sagartias. We find it here in the intertidal zone and brackish waters of relatively high salinity. Can there be freshwater influence in the upper 3m (melting snow etc.) at Egersund, Erling Svensen? In contrast to both other Sagartias S. ornata is a species bearing live young. Escape of young specimens through the mouth would be a confirmation.

Marco Faasse Furthermore, in S. ornata I often see light-coloured vertical lines on the lower column, rising up from the rim of the base and breaking up into a row of dots. I belive in S. elegans the dots are scattered randomly.

Erling Svensen Thanks Marco. But Our exposed localities are not influenced by riverwater or brackish water. The salinity is high. I find this species ONLY in very exposed localities fare out from the harbour at the outermost islands. So - I do not know. I would like to sample some and send - but to whom? The vertical lines could be seen on this specie (Picture), so it could be ornata. But I would like to have this confirmed.

Erling Svensen Chris - could I sample some and send to you?

Erling Svensen One more thing - I NEVER see them bigger than 1 cm across. So I do not have a clue of what I see. Best would be to collect and send to somebody.

Erling Svensen Could this be Kadosactis abyssicola? I have the Danmarks fauna book from 1945 and I have looked in the Distribution of marine, benthic macroorganisms in Norway. This is the only one that I feel it could be?

Chris Wood Erling. I am afraid I am not a taxonomist and wouldn't have the facilities to deal with a sample. Sorry.

Message posted on Seasearch Identifications on 15 Jul 2013
Paul Semmens Any idea on the species. Sagartia elegans maybe? From the Helford in Cornwall. thanks in advance. Paul

David Fenwick Snr Hi Paul Cereus pedunculatus, Daisy Anemone found quite a few like it the other day down Chyandour.

Andy Horton Cereus pedunculatus confirmed

Paul Semmens Many thanks. Cheers

Andy Horton Are these embedded in limestone rock in holes?

David Wilson There are lots of these in shallow rock pools on the outer edge of the eastern side of the Salcombe Estuary. They grow out of crevices in the volcanic rock.

David Fenwick Snr Yes Andy you can find this species embedded in holes in limestone and other rocks, it'll also get in cracks and crevices in the bottom of rockpools and is a frequent find under stones on sheltered shores on the south coast of Cornwall. I think it's more likely to form this sort of cristate habit when growing in cracks on more exposed shores; when in holes on sheltered shores the species appears more soft and delicate, often with a much larger trumpet. I've often had to do a double take with this species in the past because of variation due to habitat and exposure.

Andy Horton We get these on Sussex shores in extremely variable frequency. Sand and pebble beaches with chalk bedrock.

Animalia (Kingdom)
  Cnidaria (Phylum)
    Anthozoa (Class)
      Hexacorallia (Subclass)
        Actiniaria (Order)
          Nyantheae (Suborder)
            Thenaria (Infraorder)
              Acontiaria (Superfamily)
                Sagartiidae (Family)
                  Cereus (Genus)
                    Cereus pedunculatus (Species)
Associated Species