Ancula from NE Pacific

May 29, 2006
From: William Hevener

Attached is a picture of a nudibranch that I have neither seen nor been able to identify via the web or books. Any assistance would be greatly appreciated.

Locality: Langley, 37 feet, WA, USA, Pacific Ocean, 14 May 2006, Tidal, Shore, Sandy Bottom. Length: 14 mm. Photographer: William H. Hevener.

Bill Hevener

Hevener, W.H., 2006 (May 29) Ancula from NE Pacific. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Bill,
This is part of the Ancula puzzle. Species from both the northern Pacific have been idnetified as Ancula gibbosa but some with distinct yellow lines, from the nthn Pacific have been distinguished as Ancula pacifica. At present I have them all together on the Ancula gibbosa page. Looking carefully at your photos I can see traces of yellow on the papillae around the edge of the body and on the gills which might suggest a link between the pale translucent white forms and the yellow-lined A. pacifica forms.

Interestingly, your animal is closest in colour to one in Alan Shepard's message [#8883] from the Atlantic coast of Nth America.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (May 29). Comment on Ancula from NE Pacific by William Hevener. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Ancula gibbosa

Related messages

  1. Ancula gibbosa from California
    From: Clinton Bauder, May 31, 2007
  2. Re: Ancula from NE Pacific
    From: Jan Kocian, June 3, 2006
  3. Re: more Ancula from NE Pacific
    From: Jan Kocian, June 1, 2006
  4. Spotted Ancula from eastern Russia
    From: Alexei Chernyshev, January 13, 2006
  5. Ancula pacifica from South Korea
    From: Dong Bum Koh, July 16, 2005
  6. Spotted Ancula from NE Pacific
    From: Sandra Millen, July 11, 2005
  7. Ancula pacifica from Vancouver, Canada
    From: Paul Sim, June 13, 2005
  8. Re: Supplement to Pacific Coast Nudibranchs
    From: Joao Pedro T. L. S. Silva, July 23, 2004
  9. Ancula gibbosa from Massachusetts, USA
    From: Alan Shepard, January 13, 2003
  10. Ancula gibbosa from New England
    From: Alan Shepard, March 20, 2002
  11. Colour variation in Ancula gibbosa
    From: Bernard Picton , March 6, 2001
  12. Re: Ancula pacifica feeding photos
    From: Jeff Goddard, June 29, 2000
  13. Ancula pacifica feeding
    From: Bruce Wight, June 28, 2000
  14. Ancula pacifica mating
    From: Bruce Wight, June 20, 2000
  15. Ancula pacifica in Oregon and Washington
    From: Jeff Goddard, June 12, 2000
  16. A photo of 'typical' Ancula pacifica
    From: Dave Behrens, June 11, 2000
  17. Photos from British Columbia
    From: Marli Wakeling, June 3, 2000
  18. Ancula gibbosa white-spotted version
    From: Marli Wakeling, May 28, 2000
  19. Ancula gibbosa colour variety
    From: Sandra Millen, May 19, 2000
  20. Differences between species of Ancula
    From: Sylvain LE BRIS , March 26, 2000

Show factsheet and all related messages