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Sagartia ornata

(Holdsworth, 1855)


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
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
Erling Svensen One more from the dive today. Very, very exposed (first dive exposed for more than 4 months) on a rock-wall, only the North Sea between me and UK. There were many, many tine anemones from 3 meter to 5 meters deep. Only 1 cm across. I have a feeling that this is Anthopleura thallia. Agree?

Meg Daly I can't see the acrorhagi or column in this view. The oral disc pattern and tentacles are very "Anthopleura-y" to me, though.

Marco Faasse The black an white B-shaped marks near the base of the tentacles are typical of Sagartia troglodytes. The habitat is not typical for this soft substrate species though. That being said, this species does occur on rock in somewhat exposed areas in some numbers, but does not grow as large as usual there.

Bernard Picton I think this is what I'm calling Sagartia ornata. I saw them at Egersund in just a few metres when I visited you Erling.

Erling Svensen Well, I can not agree in this one, Bernard. This one growd only in the most exposed places, shallow, and It do not looks like the one I call S. ornata. I will find some more pictures....

Marco Faasse I have never been able to find S. ornata sublittorally, except in brackish water. It's a viviparous species, it's not a rare event to see them produce young, but I've never seen this in Sagartias with the B-marks.

Marco Faasse After looking at some of my photos I must correct my statement about the absence of B-marks in S. ornata. So it seems not impossible to me that this is S. ornata in spite of the habitat being unusual for this species as well.

Message posted on NE Atlantic Cnidaria on 14 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
Marco Faasse Sagartia ornata, Zierikzee, NL, intertidal at HW

Marco Faasse Another specimen @ Goesse Meer, NL, brackish: http://www.facebook.com/photo.php?fbid=272492132828637&set=a.144520425625809.37113.100002035584345&type=3&theater

Message posted on NE Atlantic Cnidaria on 14 Mar 2012
Taxonomy
Animalia (Kingdom)
  Cnidaria (Phylum)
    Anthozoa (Class)
      Hexacorallia (Subclass)
        Actiniaria (Order)
          Nyantheae (Suborder)
            Thenaria (Infraorder)
              Acontiaria (Superfamily)
                Sagartiidae (Family)
                  Sagartia (Genus)
                    Sagartia ornata (Species)
Associated Species