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Coryphella gracilis

(Alder & Hancock, 1844)


Linda Raaphorst Coryphella gracilis at 'Zeelandbrug', the Netherlands.

Jack de Vries nice shot linda

Walter Bassi Compliments Linda,beautiful macro

Message posted on Underwater Macro Photographers on 17 Apr 2012
Justin Evans I'm hoping someone can help with the ID this for me as I'm drawing a blank on a species of nudi with green/yellowish cerata. Taken last Saturday on the Far Mulberry off West Sussex, 11m depth.

Richard Shucksmith Coryphella gracilis? Green variety? or Cuthona viridis?

Erling Svensen Cuthona viridis

Jim Anderson Trinchesia viridis I think

Justin Evans Many thanks everyone.

Brendan Oonk Flabellina gracilis forma smaragdina

Justin Evans Having looked at Cuthona/Trinchesia viridis on habitas.org.uk, the description doesn't quite match the ones I saw an photographed. In particular the cerata have no streaks or spots of white colouring on the surface, they are plain green colour to the cnidosacs at the tip. And the brown coloured jaws are said to visible through the head in viridis. Therefore, I think these must be C.gracilis var smaragdina which have no white spots or lines on the cerata and also have the white marking on the tail, as per the photo. I haven't seen either species before, so if I'm wrong please do let me know.......I'm no expert!

Christian Skauge Looks like a Flabellina to me :-)

Brendan Oonk Yes Dawn, it is F. gracilis... When its food source is different, it turns green.

Ian Smith See http://www.conchsoc.org/node/3989 click on image to enlarge.

Message posted on Seasearch Identifications on 29 Apr 2013
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
              Aeolidida (Infraorder)
                Flabellinoidea (Superfamily)
                  Flabellinidae (Family)
                    Coryphella (Genus)
                      Coryphella gracilis (Species)
Associated Species