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Fucus serratus

Linnaeus, 1753

Wendy Northway last one - is this kelp fir or a tutfy bryozoan?

David Kipling Or more fluffy weed?

Becky Hitchin Apparently it's part of the seaweed, well that's what Ian T keeps telling me, though it seems odd still!

Becky Hitchin Not sure if this is actually right in detail, but have found a good amount of cooroboration for the white hairs being part of the weed itself. http://www.fisherycrisis.com/images/129-2903_IMG.JPG

Wendy Northway just been on the Marlin website for fucus serratus and read this

Wendy Northway The frond surface has numerous pin-pricks with clusters of tiny white hairs

Becky Hitchin Yep, it seems a serratus thing. Not sure abotu spiralis, but not seen it on vesiuculosus

Wendy Northway so it looks like it is part of the plant, not an epiphyte after all. Many thnaks

Becky Hitchin is something about increasing respiratory surface, I think

Becky Hitchin yep, not an epiphyte

David Kipling Does rather look like the pics of Elachista here (look at the RHS top two images). http://www.algaebase.org/search/species/detail/?species_id=49

Becky Hitchin doean't have the same feeling though, Elachista isn't always white, and isn't so regular looking

Wendy Northway Just looked at a few otehr images of elachista and it appears to be a larger and brown coloured epiphite. There is one picture with the white tufts that I have posted and the two additions look distinctively different. However, I am no expert, which is why I posted here

Wendy Northway http://www.aphotomarine.com/brown_seaweed_elachista_fucicola_tiny_wrack_bush.html

Jane Pottas Hyaline hairs - associated with nutrient uptake, not respiration.

Becky Hitchin Thank you Jane!

Message posted on Seasearch Identifications on 22 Aug 2012
Ian Smith The differences in aperture size and wall thickness are most marked when immature L. obtusata (top row) are compared with adult L. fabalis (bottom row). On immature L. obtusata the aperture flares out at the anterior (lower edge in this figure), giving a less rounded outline. (All specimens at same scale).

Ian Smith Image and caption from as yet unpublished article on separating the spp. Refereed by author of Ray Soc. monograph on Littorina. L.obtusata population on Ascophyllum & L. fabalis population on Fucus serratus on same beach on Menai Strait. Id confirmed by examination of penes. Immature L. obtusata have a more marked flare to anterior (base of aperture).

Message posted on British Marine Mollusca on 15 Mar 2013
Erling Svensen Could this be some kind of barnacles? Norway yesterday evening.

Marco Faasse Sure! Verruca stroemia. Here we call it (translated): zipper barnacle. You see why :-)

Erling Svensen Thanks a lot Marco. A new species on the list. Need to buy a botle of red wine......

Ian Smith http://www.flickr.com/photos/56388191@N08/sets/72157629143972722/

Jane Pottas I recognise them as V. stroemia but I like the name zipper barnacle!

Marco Faasse Congrats, Erling! Keep searching. Always good to find a reason to open a bottle. If I can help to find new species ...

Erling Svensen You are welcome to Norway to help searching.....

David Kipling Ian ... that flickr set is excellent, the way you use the embedded dynamic annotation of the pictures is great, not seen that before!

Ian Smith Thanks David. There have been big changes to Flickr recently: Free storage for about half a million images per person. All users can now arrange images in "collections" of "sets" for free. Sadly the "collections" button is hard to find; users need to click on the 3 dots at top right to get a drop down menu with it on. My collections (barnacles - set each for the 9 littoral UK spp. and gastropods - set each for 4 small spp. ;more to come) are at http://www.flickr.com/photos/56388191@N08/collections/

David Kipling Erling's zipper photo for Inga Williamson, plus do have a look at Ian's flickr album, it has some cool feature. Oh, and welcome to Seasearch ID ;)

Inga Williamson Thanks David - great picture indeed

David Kipling Ian, Erling ... I've never seen these in the UK but there are loads of records. What sort of depth/habitat do you find them?

Ian Smith Low water, Fucus serratus zone downwards. Often on F. serratus and often UNDER stones - look crushed. On Menai Strait often common but invisible under sponge, except for red gape when open. I found a Lamellaria perspicua with a good imitation of the gape and sponge (pic on Conch Soc site). Verruca stroemia is such a distinctive sp. with its chevron pattern of grooves/ridges that I think records will be ok, but a similar Verruca sp. in Mediterranean needs inspection of underside of opercular valves to differ.

David Kipling I shall have to have a hunt!

Ian Smith Southward says to 500 metres. Moment of self doubt -I THINK it occurs on F. serratus, but my memory might be confusing it with Balanus crenatus. Will check on my next visit. Certainly likes under stones, but not exclusively.

David Kipling 500m deep?!?

Ian Smith Well NBN does have a saltmarsh sp recorded on the Brecon Beacons :-)

Message posted on Seasearch Identifications on 11 Jul 2013
David Fenwick Snr The stalked jellyfish Craterolophus convolvulus and Lucernariopsis campanulata are now turning up, in low numbers, at a number of sites around the Mounts Bay and Penwith region of Cornwall. Image below Craterlophus convolvulus. Most common host so far is Sargassum.

David Fenwick Snr I should have added, turning up intertidally, lowershore and middleshore rockpools.

Bernard Picton The Sargassum in Strangford Lough has some nice hydroids on it, perhaps these invasive aliens just increase the biodiversity by providing more niches....

David Fenwick Snr Sargassum is one of the main algae species I check for stalked jellyfish I've found 4 species on it now, although I've never found stalked jellyfish on it where it forms thick mats, but the peripheries are good places to search as are the old stumps left behind after the autumn gales. Intertidally, I seem to find most well away from larger algal species, especially those that occur around pool fringes. e.g. Fucus serratus; and many are found on algae where pools narrow and drain into one another. I find the same on the intertidal eelgrass bed I search, sparcer areas and areas where water drains, either salt or fresh are good to search. Of course stalked jellyfish are probably more easy to find in such sparce areas as well, but of course there's more water movement around such areas and thus they will be good areas to feed if you're a species 'relatively' fixed in one position. Local currents may of course be responsible for the distribution of early life stages. I can certainly see a pattern emerging round here with them.

Andy Horton I have received at least two (probably more) reports of people swimming through Sargassum and receiving a bright red scar (like jellyifsh weals) which could last for six months. Could he hydroids cause this? Or rather are their own experiences of this put down to this cause. The reported evidence of wounds like this have been caused by the Snakelocks Anemone, Anemonia viridis. There have been many attributed to the latter.

David Fenwick Snr I'm handling stalked all the time and it's not them. On looking through Sargassum I often find quite a number of juvenile snakelocks, especially near the base. Never seen much else on it on the shore but I guess jellyfish could become trapped amongst it during the summer when people are swimming. It's tending to die back down and sinking around here at the moment.

Message posted on NE Atlantic Cnidaria on 04 Sep 2012
Chromista (Kingdom)
  Harosa (Subkingdom)
    Heterokonta (Infrakingdom)
      Ochrophyta (Phylum)
        Phaeista (Subphylum)
          Limnista (Infraphylum)
            Fucistia (Superclass)
              Phaeophyceae (Class)
                Fucales (Order)
                  Fucaceae (Family)
                    Fucus (Genus)
                      Fucus serratus (Species)
Associated Species