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Halecium muricatum

(Ellis & Solander, 1786)

Terry Griffiths Another one Is anyone using the Nikon 60mm G ED seem to have a lot of photo's out of focus compared to when i was using the Canon 60mm any advice .

Bernard Picton Is the one at the top the same individual as in your other post Terry? These are on a piece of Nemertesia and the lower one seems to have more of a brown ground colour between the tubercles on the cerata and less flared rhinophore sheaths.

Rob Spray Hi Terry Griffiths do you mean repeatable mild image softness or regular, random, gross errors? Any comment from me would be generic - I'm an Atheist as I have Olympus. There's plenty that could be happening but I haven't heard much from Nik folk other than a tendency to use apertures which would lead to diffraction.

Erling Svensen My favorite lens is the Nikon 60 micro. I was out today and worked with that lens. Most pictures I use f 29 to 32 so there is maximum sharpness. Also the shutterspeed is important at macro/micro. I use 200/1 and feel that is i

Erling Svensen A good option. Sorry that I sent of this massage before finishing it. How the flashes are placed also do a lot how the pictures will come out. These dayes it is like cheeting as it if possible to see the picture just when it has been taken. In the old dayes there were only 36 and we could not ses the pictures before 3 - 4 dayes later and no way to change exposure or anything else when diving. So today "everybody" can take good pictures....

Rob Spray Hi Erling Svensen That's intriguing as those are well beyond the start of diffraction - shows there's a balance to be struck between finding a lens' sweet spot and having enough depth of field. I rarely go beyond f13 because I have a smaller sensor - and to save my strobe batteries :-)

Terry Griffiths Hi bernard no this was taken within a couple of metres of the other photo ,always know where to find them as we call it on old mans beard

Terry Griffiths Hit the enter button again ...(Halecium muricatum)and as the new growth is springing up there very easy to find.@Erling that is the same setting i'm using so thank you and Rod for your comments :)

Message posted on NE Atlantic Nudibranchs on 17 Mar 2012
Sarah Bowen Is this Halecium muricatum? Seen yesterday in South Pembs - I note that it's usually a northern species, although has been recorded from Skomer. So a bit unsure at the moment and any help gratefully received.

Bernard Picton Yes, I agree, H. muricatum. Yellow stem, irregular 3d branching.. Quite common on the north side of Skomer I think, together with Cuthona pustulata...

Sarah Bowen Thank you - lovely dive but disappointingly lacking in nudibranchs so far this year! Mind you, we're supposed to be concentrating on squirts so that's my excuse!

Message posted on NE Atlantic Cnidaria on 20 May 2013
Terry Griffiths Doto fragilis Just starting to get large numbers breeding around the Plymouth area

Tamsyn MAnn Nice one! Not seen that one... I think that's the one I've nicknamed the cauliflour one!!

Bernard Picton Doto fragilis is an entity which I strongly suspect of being more than one species. I call this one the "giant form" as it grows larger than ones on other hydroids. I think the hydroid in this case is Halecium muricatum. Nice photo Terry! Note also the extra large rhinophore sheaths and the raised tubercles on the back.

Message posted on NE Atlantic Nudibranchs on 17 Mar 2012
Animalia (Kingdom)
  Cnidaria (Phylum)
    Hydrozoa (Class)
      Hydroidolina (Subclass)
        Leptothecata (Order)
          Conica (Suborder)
            Haleciidae (Family)
              Halecium (Genus)
                Halecium muricatum (Species)
Associated Species