Peachia cylindrica

Erling Svensen Do any of you know if these "worms" are food for the Bolinopsis, or do you thing that they are some kind of parasites?

Marco Faasse The American ctenophore Mnemiopsis leidyi may be infested by larvae of the sea anemone Edwardsiella lineata: http://www.sciencemadecool.com/2008/05/friday-parasite.html

Marco Faasse Likewise, larvae of the European anemone Peachia cylindrica live in hydromedusae (and perhaps ctenphores?).

Angela Gall Can anyone tell me if this is Halcampa chrysanthellum please? I haven't seen it before. It was in a seagrass bed at Looe, Cornwall and it retracted into the sand when I got too close.

Marco Faasse Little doubt about that. Only Peachia cylindrica is similar, but Peachia has longer tentacles and a lobed protuberance on one side of the mouth. Nice find. I've seen it only twice, in Scotland.

Angela Gall Thanks very much Marco, yes it did look quite different from Peachia cylindrica. I had better submit a record then!

Bernard Picton I think this is a partially contracted Peachia cylindrica. It's difficult without a scale (Halcampa is usually much smaller) but there is something about the taper of the tentacles. As Marco says there is a three-lobed conchula at the mouth in Peachia, this one seems to have the mouth partially everted.

Marco Faasse I'm afraid Bernard is right. It's certainly not a normally expanded Peachia and the tentacle length relative to disc diameter fits Halcampa better. BUT Halcampa has tentacles which taper only slightly and which end in a rather blunt tip.

Marco Faasse This one I identified as Halcampa chrysanthellum: http://www.facebook.com/photo.php?fbid=283052001772650&set=a.255646997846484.59735.100002035584345&type=3&theater

Angela Gall Ok, thanks, I saw a couple of them and they both had these short stubby tentacles. I'm not able to view your image Marco I think we have to make friends first! I'm going to post one more image just in case it provides more info.

Angela Gall Thanks I can see it now, they are so similar! but I do see what you mean about the blunt ended tentacles. I'm not sure what it was doing with its mouth, maybe I should have waited longer for it to settle down after coming up out of the sand. It was very small, I'd say 2cm across including tentacles.

Marco Faasse Tentacle span of Halcampa I've seen was less than 2 cm, Peachia may reach 12 cm, so that's not conclusive. The habitat doesn't help either, eelgrass meadows are perfect for Halcampa. Maybe you'll get an opportunity to return to the spot in the future?

Angela Gall I'm going to have to go back, it's not too far away, I'll tell some others to be on the look out for it as well.

Paula Lightfoot Does anyone have a photo of Peachia cylindrica that they would be happy to share for use in the Name a Species competition run by Natural England and The Guardian?

Paula Lightfoot Hi, does anyone have photos of the anemone Peachia cylindrica, the parasitic barnacle Sacculina carcini or the red seaweed Halymenia latifolia that they would be happy to share for use in the 'Name a Species' competition run by Natural England and The Guardian?

Peter Glanvill I have one that probably would be acceptable. Taken a year or two ago at Babbacombe. Where would you like me to send it?

Darryl Mayer Peachia cylindrica, the one with the W or M on each tentacle? I have some from a while ago too.

Paula Lightfoot That would be lovely thanks - I'll send a message with my email address!

Darryl Mayer Picture sent.

George Brown Hi Paula, got a couple of photos showing Sacculina carcini on a shore crab. Still need them?

Paula Lightfoot Hi George Brown, that would be great thanks - I've got a couple of lovely Peachias now but no Sacculina.

Andy Horton If you get really stuck for Sacculina, I am sure I have some in my slide collection. The quality might be naff though.

Andy Horton http://www.flickr.com/photos/gwylan/2170500886/

Paula Lightfoot Desperate last minute addition to this request!! Does anyone have a photo of Brissopsis lyrifera pleeease! (heart urchin found in mud/sand...possibly not so likely to be seen by divers?)

Darryl Mayer I'll have a look P. I think I do.

Darryl Mayer I have one, a dead one but nearly complete?

Peter Glanvill I have one I use in talks but the urchin is mostly covered in sand although on the surface - you can just see a few bristles.

Christine Howson I'm sure there's a Brissopsis picture int he MNCR sealochs collection

Paula Lightfoot Hi, does anyone have photos of the anemone Peachia cylindrica, the parasitic barnacle Sacculina carcini or the red seaweed Halymenia latifolia that they would be happy to share for use in the 'Name a Species' competition run by Natural England and The Guardian?

Peter Glanvill I have one that probably would be acceptable. Taken a year or two ago at Babbacombe. Where would you like me to send it?

Darryl Mayer Peachia cylindrica, the one with the W or M on each tentacle? I have some from a while ago too.

Paula Lightfoot That would be lovely thanks - I'll send a message with my email address!

Darryl Mayer Picture sent.

George Brown Hi Paula, got a couple of photos showing Sacculina carcini on a shore crab. Still need them?

Paula Lightfoot Hi George Brown, that would be great thanks - I've got a couple of lovely Peachias now but no Sacculina.

Andy Horton If you get really stuck for Sacculina, I am sure I have some in my slide collection. The quality might be naff though.

Andy Horton http://www.flickr.com/photos/gwylan/2170500886/

Paula Lightfoot Desperate last minute addition to this request!! Does anyone have a photo of Brissopsis lyrifera pleeease! (heart urchin found in mud/sand...possibly not so likely to be seen by divers?)

Darryl Mayer I'll have a look P. I think I do.

Darryl Mayer I have one, a dead one but nearly complete?

Peter Glanvill I have one I use in talks but the urchin is mostly covered in sand although on the surface - you can just see a few bristles.

Christine Howson I'm sure there's a Brissopsis picture int he MNCR sealochs collection