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Sagartiogeton laceratus

(Dalyell, 1848)


Erling Svensen This anemone is very common in one fjord in South West Norway. From 15 meter and down to 30 meter. There are many, many of it, but not like the Sagartia elegans ones that grown in colonies. This one is growing one and one with some centimeters between them and do not seems that they clone themselves. But I do not know. All the same colours all over the location, and they grow to 2,5 cm high aprox. Any idee?

George Brown It looks like Sagartiogeton laceratus. Most of the time I see it in silty sand, presumably attached to shell fragments and buried pebbles but occasionally find them out as in your photograph.

Andy Horton Sagartiogeton laceratus

Message posted on NE Atlantic Cnidaria on 27 Dec 2012
Erling Svensen I have big problems to identify sea anemones from Norway. Bernard said he would like a picture down on the disk, one from the side, and one after I have touched it. Here is one that I have done just like that. Any one that will try to name it? It is aprox. 2,5 cm high, and the grow in colonies. From Egersund harbour, 5 meter of sea water.

Estefania Rodriguez uhmmm, beautiful pictures...regrettably I know nothing without looking inside them...Sorry!

Erling Svensen Just like the surgeon people..... ;-)

Andy Horton The spotted column is confusing.

Andy Horton If it is not spotty I think it is Diadumene cincta.

Estefania Rodriguez In the column it has tubercles, some Sagartiogeton species have them...

Andy Horton Tubercles would rule out D cincta, but the poke response in the first picture is typical of D cincta.

Andy Horton Tentacles are like Sagartiogeton undatus.

Andy Horton Based on the Chris Wood sea anemone book I would go on Sagartiogeton laceratus. I do not know this sea anemone though.

Andy Horton https://www.google.co.uk/search?q=Sagartiogeton+laceratus&hl=en&safe=off&prmd=imvns&source=lnms&tbm=isch&ei=G2JfT-2wOOaW0QXH95nkAw&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CA4Q_AUoAQ&biw=1024&bih=606

Erling Svensen Yes, I feel that this is correct. Thanks

Darryl Mayer It would help with ID's if the pictures were larger. I run a notebook and the screen isn't big to begin with and these pictures all lumped together makes them even smaller to the extent I cannot make out any detail.

Erling Svensen If you download the pictures to your own computer you can look closer....

Bernard Picton I agree with most of the comments so far, ie. not sure what this could be!! Erling, did you photograph other individuals or are they all very similar.

Message posted on NE Atlantic Cnidaria on 12 Mar 2012
Erling Svensen This tiny anemone, only 1 cm high, from the night dive yesterday. Could it be Sagartia ornata? Bottom soft with dead mussels, 12 meters deep.

Andy Horton It is hard to ID anemones. It is wedged between the shells with a long column? This would be like Sagartia. It does not show the variety of colour pattern I have seen in Sagartia troglodytes, so I think it is a different species with Sagartia ornata being favourite.

Erling Svensen Thanks. I have a feeling also for S. ornata. Lets wait for Bernard and hope he agree!

Estefania Rodriguez Bernard, at the end you know more about identifying living anemones from pictures...I can only confirm ID if I have the "beast"...

Bernard Picton I'm on the road at the moment, will look at this next week.

Bernard Picton Faani, do you have any resources for showing people how the tentacle arrangement is described? Perhaps a photo with the primary, secondary etc. tentacles labelled?

Cynthia D. Trowbridge May I ask about what type of camera you use? Sorry for the technical question but you photo is so clear! Thanks!

Bernard Picton Don't ask Cynthia! It's the flashguns (strobes) and lighting too. I wish I could see what it was he does differently to me!

Bernard Picton Erling Svensen, the disc pattern is most like Sagartiogeton laceratus in my opinion. If you are photographing anemones for ID it's important to be able to see the column too, and something straight down (not artistic) on the disc for seeing the exact tentacle arrangement. I appreciate that this is small, and those things aren't always possible. The other thing to do is give it a poke so it closes; that will show the top of the column usually, whether the tentacles are taken right in, and sometimes white threads, acontia, will be expelled. These are all important clues for ID of unknowns.

Erling Svensen About the camera and phototechnique: I use (still) the Nikon D-300 in a Subal housing with two flashes, one on each side. The aperature is important. Here I used aperature 32 that gives me maximum dept of field. If the picture is to sharp I can run it in Photoshop and blure it a litle bit ;-). I said still - now I am waiting for the Nikon D-800 that will give 36 Megapixel :-)

Erling Svensen Thank you Bernard fort the descripsion about how to take pictures that gives maximum possibility for identification. I will remember. For us "non biologists" it is a good help to learn how to photograph so that all of you specialist can see what you need for identification.

Andy Horton Sgartiogeton laceratus http://www.marlin.ac.uk/speciesinformation.php?speciesID=4288 I always (uo to now) forget this species because I have never seen one.

Andy Horton Can anybody suggest a common name for this species? http://www.naturalengland.org.uk/ourwork/conservation/biodiversity/englands/nameaspecies2011/Sagartiogetonlaceratus.aspx

Bernard Picton I agree with Bill Rudman re. common names. This group is intended for multiple nationalities. http://www.seaslugforum.net/find/common

Message posted on NE Atlantic Cnidaria on 07 Feb 2012
James Lynott Is this Sagartiogeton laceratus? Photographed yesterday in Loch Creran at about 20m.

Sarah Bowen In a sea-loch setting, it's much more likely to be Protanthea simplex, the sea-loch anemone. Perfect location for it.

James Lynott Thanks for your comment. There are P. simplex here as well but I am wondering about the anemone with the long column in the centre of the image.

Sarah Bowen Ah, silly me! I thought it was a worm tube at a brief glance....Sorry!

Ron Ates It would indeed be nice to see pictures showing the disc. Sagartiogeton laceratus very rarely shows an elongated column like this and it has a reputation

Ron Ates Sorry. to occur in aggregated groups.

James Lynott Thanks everyone for input. Unfortunately I didn't get any pictures of the disc as it was hanging from a vertical rock face at an awkward angle. I did wonder if the column was too long for S. laceratus and this was the only one present. If not S. laceratus then any suggestions to what it may be?

Ron Ates Probably there is some detritus lying on the column? For what it's worth S. undatus would also be my best guess. Wild guess though, because I do not see stripes on the column and the tentacles are hardly visible. By the way, specimens of S. laceratus have been seen a couple of years ago in the very shallow part near the loch head in Loch Creran. Lucky you, you can go there again.

James Lynott Thanks, I hopefully be back there soon so will keep a look out and try and get some better pictures.

Erling Svensen I have a feeling that the S. laceratus have stripes along the column. I would have gone for S. undatus.

Message posted on NE Atlantic Cnidaria on 13 Oct 2013
Rachel Shucksmith Does anybody know what anemone this is? Was quite small, the bryzoan shows the scale. There were a few of a similar size. Wasnt sure if was a small anemone or just a juveniles.

Claire Goodwin Hi Rachel - looks like Sagartiogeton laceratus - did it have a long column and what was the habitat?

Rachel Shucksmith it was on a very muddy wall, in probably 15m of water the one with the bryzoan is on a sea squirt. The wall is right at the top of a silled voe (sea loch) in Shetland. The column wasn't particularly long but it was only about 5-10mm, so was hard to see in situ... I thought all the 'bobbling' at the bottom was perhaps where it had contracted. So I guess could be longer.

Claire Goodwin Colouring and tentacles look like that but habitat doesn't sound right - normally on stones or shells in mud.

Rachel Shucksmith there weren't any big ones about to help with ID either, but I agree that Sagartiogeton laceratus is what it looks most like in Chris anemone book in terms of colouration

Bernard Picton I've seen masses of them in a cave at St. Kilda, no sign of any mud, so they can live in clean rocky habitats as well, Claire.

Chris Wood Certainly the colour is right for Sagartiogeton laceratus but the tentacles and column both seem short. Both are normally quite long. Maybe it is because its a baby. I can't think what else it would be unless Erling Svensen has something in Norway that has crept into Shetland.

Claire Goodwin Interesting Bernard - thanks.

Rachel Shucksmith We dived another area in the voe today and there were more on mud and adult size, although comparatively stumpy compared to the book description.

Message posted on NE Atlantic Cnidaria on 26 Apr 2013
Andy Horton This is not my photograph and I have never seen a British sea anemone with such pronounced stripes on its column: (I would not pen this as Sagartia elegans ???)

George Brown Actinothoe sphyrodeta.

Erling Svensen What about Sagartiogeton laceratus? We have them here in Norway, and I have always called them S. laceratus?

George Brown In my experience the habitat in the photo also looks too wrong. I only see S. laceratus in silty environments growing out of the mud, maybe anchored to a shell or pebble but never on bedrock. But what makes Norway so exciting is that there, everything is so different so who knows!

Andy Horton Actinothoe. I was thinking pof S laceratus at first. http://www.flickr.com/groups/cnidarians/

Message posted on NE Atlantic Cnidaria on 03 Jun 2012
Taxonomy
Animalia (Kingdom)
  Cnidaria (Phylum)
    Anthozoa (Class)
      Hexacorallia (Subclass)
        Actiniaria (Order)
          Nyantheae (Suborder)
            Thenaria (Infraorder)
              Acontiaria (Superfamily)
                Sagartiidae (Family)
                  Sagartiogeton (Genus)
                    Sagartiogeton laceratus (Species)
Associated Species