Re: Blue Hypselodoris bullocki egg-laying

March 3, 2009
From: Barbara Hanchard


Concerning message #12058:

Bill,

Unable to get a picture of the eggs actually coming out of the genital opening which would confirm that this animal was actually laying the egg ribbon and not transiting over it. Numerous others close by on the move and feeding but I didn't think to take photos of the ones feeding. While I find these slugs right across this dive site (Leilei, Honiara) they seem to congregate in larger numbers in one particular spot. Hope the photos are of some use.

Locality: Leilei, Honiara, 12 meters, Solomon Islands, Pacific, 21 February 2009, Sandy slope. Length: 30 mm. Photographer: N.Barbara Hanchard.

Barbara

nbhanchard@gmail.com

Hanchard, N.B., 2009 (Mar 3) Re: Blue Hypselodoris bullocki egg-laying. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22275

Thanks Barbara,

I wouldn't be surprised if this is the egg mass of this animal, as most of the 'colour forms' or species I am lumping in Hypselodoris bullocki [and H. apolegma] have this shaped and coloured egg ribbon [see message #7110] .  Interestingly, the photo your refer to [#12058] has a rather sinuous ribbon with multiple coils rather than the stiff ribbon of about one and a half coils which yours has. The  ribbons I have seen are usually as in your animal, but as you will see on the Forum, sometimes there are multi-coiled ribbons and they are not confined to a specific colour form.

I was interested in your suggestion that this species tends to  congregate in one spot. While this may be the result of some peculiar physical conditions -such as light or water currents - I wouldn't be surprised if it coincided with the presence of its food sponge or perhaps a large concentration of the food sponge at that site. Perhaps there are good growing conditions for the sponge at that spot. Have a look at photos in messages #19355; #16260 for good photos of its favourite food Euryspongia.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Mar 3). Comment on Re: Blue Hypselodoris bullocki egg-laying by Barbara Hanchard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22275

Factsheet

Hypselodoris bullocki - Page 3

Related messages

  1. Re: Hypselodoris bullocki? again
    From: Marcel Tanke, November 27, 2008
  2. Hypselodoris bullocki? feeding
    From: Kenneth Yong, April 29, 2008
  3. Re: Purple sea slug
    From: Ben Newsome, April 23, 2008
  4. Hypselodoris bullocki ? from Papua New Guinea
    From: Bob Gaensslen, August 18, 2007
  5. Hypselodoris bullocki feeding
    From: Richard Swann, May 14, 2007
  6. Hypselodoris bullocki from the Great Barrier Reef
    From: Richard Ling, March 15, 2007
  7. Hypselodoris bullocki - feeding record
    From: Bill Rudman, February 13, 2007
  8. Re: Hypselodoris bullocki? from Malaysia
    From: Asther Lau, December 11, 2006
  9. Hypselodoris bullocki from Indonesia
    From: Charles Rowe, November 22, 2006
  10. Re: H. bullocki feeding - or at least tasting
    From: Leslie Harris, August 3, 2006
  11. Re: Hypselodoris bullocki feeding - or at least tasting
    From: Brian Francisco, August 1, 2006
  12. Hypselodoris bullocki feeding - or at least tasting
    From: Brian Francisco, July 31, 2006
  13. Hypselodoris bullocki? - Feeding ?
    From: Kerem Turker, May 27, 2006
  14. Hypselodoris bullocki - feeding
    From: Guido & Philippe Poppe, April 10, 2006
  15. Hypselodoris bullocki in aquarium
    From: Jim Steil, March 7, 2006
  16. Hypselodoris bullockii? from Malaysia
    From: Asther Lau, December 14, 2005
  17. Re: Hypselodoris bullocki - different colours mating
    From: Paul Whitehead, October 25, 2005
  18. Blue Hypselodoris bullocki egg-laying
    From: Matthew, February 1, 2004
  19. Hypselodoris bullocki mating
    From: Fredy Brauchli, January 22, 2004
  20. Blue Hypselodoris bullocki mating
    From: Mary Jane Adams, January 19, 2004
  21. Hypselodoris bullocki found at Flinders Reef
    From: Gary Cobb, October 22, 2003
  22. Hypselodoris from Anilao
    From: Ray Izumi, July 21, 2003
  23. H. bullocki + H. apolegma?
    From: Erwin Koehler, May 2, 2003
  24. Re: aquarium slugs
    From: J.B. McClung, March 10, 2003
  25. Sea slug for aquarium
    From: j.b.mcclung, March 5, 2003
  26. Hypselodoris bullocki egg ribbon
    From: Chris Wahlers, February 24, 2003
  27. Egg masses in my aquarium
    From: Tana Landau, January 24, 2003
  28. Hypselodoris bullocki mating
    From: Mary Jane Adams , December 18, 2002
  29. Hypselodoris bullocki from Reunion
    From: Marina Poddubetskaia , November 16, 2002
  30. Two color forms of H. bullocki mating
    From: Michael Miller, November 2, 2002
  31. Hypselodoris bullocki From Riau, Indonesia
    From: Alice Lee, June 12, 2002
  32. Re: Hypselodoris bullocki - different colours mating
    From: Kheong Sann Chan, June 8, 2002
  33. Hypselodoris bullocki laying eggs.
    From: Kheong Sann Chan, June 5, 2002
  34. Hypselodoris bullocki feeding
    From: Kheong Sann Chan, June 5, 2002
  35. Hypselodoris bullocki - different colours mating
    From: Kheong Sann Chan, June 5, 2002
  36. Thank you Bill - Hypselodoris bullocki
    From: Ike, May 14, 2002
  37. H. bullocki 'colour forms' mating
    From: Erwin Koehler, May 1, 2002
  38. Hypselodoris bullocki from Malaysia
    From: Kheong Sann Chan, April 26, 2002
  39. Hypselodoris bullocki colour group (2)
    From: Bernard Picton , April 9, 2002
  40. Hypselodoris bullocki from Bali
    From: Stuart Hutchison, March 22, 2002
  41. Hypselodoris 'bullocki' again
    From: Mary Lefebvre, January 5, 2002
  42. Hypselodoris bullocki mating in aquarium
    From: Nick Gill, November 27, 2001
  43. Hypselodoris bullocki laying eggs?
    From: Matt Stryker, September 8, 2001
  44. Colour forms of Hypselodoris bullocki mating
    From: Mary Jane Adams, August 29, 2001
  45. Hypselodoris bullocki questions
    From: Drew, July 2, 2001
  46. Re: Purple sea slug in aquaria
    From: Alexandra Ellwood , May 24, 2001
  47. Purple sea slug
    From: Alexandra Ellwood, May 13, 2001
  48. Feeding a Hypselodoris bullocki
    From: Sammy Anderson, April 10, 2001
  49. Colour variation of Hypselodoris bullocki
    From: Drew Taylor, April 6, 2001

Show factsheet and all related messages