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Nicolas Jouault http://www.seanature.co.uk/marine-education/onchidella.htm
Found numerous slugs
Onchidella celtica on a number of rocks at Les Ecrehous (Jersey) including Bigorne where I have previously seen them over a decade ago. I had walked these rocks on the previous spring tides of this year and not seen any.
Richard Lord They seem to congregate and then disappear. In 2008 a fisherman told me there were lots at St Martin's Point, Guernsey. I went to look the next day and saw lots. - 8 and 9 May 2008 and have been back several times and not found them. Where did they go and why did they congregate for only a short period of time?
Nicolas Jouault 2001 when I first saw them, I have seen them since on a different rock not far from the others.
João Pedro Silva Does anyone have a good photo of
Onchidella celtica? Me and Gonçalo Calado are in the final stages of reviewing our field guide on sea slugs and would like to include a photo in the "similar animals" section.
João Pedro Silva Thanks! I've already got it from Steve.
Becky Hitchin Washed up on a strandline today were loads of these little beasties. Are they juvenile Acanthodoris? That's my only guess :)
João Pedro Silva Try photographing the animal submerged. It can be almost unrecognizable.
Becky Hitchin They were all washed up, and dead, unfortunately :)
Becky Hitchin I mean :( !
João Pedro Silva Even so, it may show better detail submerged.
Becky Hitchin I do have some here ... let me see if I can take a better pic
Andy Horton Adult
Acanthodoris pilosaAndy Horton http://www.glaucus.org.uk/A_pilosa-dark-1_AH.jpg
Becky Hitchin These were teeny compared to our normal adult ones!
Andy Horton I only see the small ones. Dark or white coloured.
Becky Hitchin these are more normal for us: http://www.flickr.com/photos/elegaer/5974609585/in/set-72157625425775330, http://www.flickr.com/photos/elegaer/5975169536/in/set-72157625425775330
Kate Lock How many were there?? I am kinda with Dawn as O.bilamellata are found in shallow waters in large congregations feeding on barnacles.....so are more likely to be found washed up in large numbers like this. A.pilosa is found in deeper waters....and not usually in large congregations...maybe 2-3 together.......on Alcyidium diaphranum. But agree need a submerged picture!
Becky Hitchin Submerged picture has been posted, if FB will let me say that! Well, I reckon there was 1 every 10cm or so in the strandline, and that was just looking at the surface
Jan Light Is there a circlet of gills at the tail end? Otherwise this looks like the pulmonate sea slug,
Onchidella celtica, to me.
Andy Horton I think I have got the species muddled up. http://www.seaslugforum.net/acanpilo.htm Young A. pilosa.
João Pedro Silva Jan Light, the photo taken with the submerged subject clearly shows the gills:
https://www.facebook.com/photo.php?fbid=10150623623459232&set=o.166655096779112&type=1&ref=nf
