Tambja morosa? from Pemba, Tanzania

November 22, 2005
From: Wilhelm van Zyl

Hi Bill,

Here are some pictures of wat I believe is Tambja morosa from Pemba island on the East African coast.According to the Factsheet the distribution is around the Tropical Western Pacific. I saw this species on quite a few dives between about 10 and 15m water depth.

Locality: Pemba island, Zanzibar, Tanzania. Indian Ocean. Depth: 10 - 15 m
Length: 6 cm. 2 October 2005. broken Coral reef. Photographer: Wilhelm van Zyl



Van Zyl, F.W., 2005 (Nov 22) Tambja morosa? from Pemba, Tanzania. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15252

Dear Wilhelm,
I am not sure how many blue marked species of Tambja there are. Baba (1987) described Tambja kushimotoensis, with a green background colour, but I suspect a species can vary from green to black in background colouration. It is possible the blue markings on the gills are an indication of different species but I think some work needs to be done on the anatomy to be sure. I have left a variety of colour forms as Tambja morosa on the Forum until Marta Pola has finshed her stuides, Hopefully she will adress the T. morosa - T. kushimotoensis question. Certainly blue coloured animals have been reported from the western Indian Ocean region and Yonow (1991) reports an animal, similar in colour to yours but with a green background colour, from Mauritius. Another complication is that Charles Eliot (1904) described a species, Nembrotha caerulea, from east Africa. Unfortunately the only information on its external colour was that it was 'blue'. From his radular description this was a species of Nembrotha rather than Tambja so it would be nice to know something about the radula of your 'blue' animals.

All I can say is that this group of nembrothids remains a 'work in progress'

  • Baba, K. (1987)  Two new green colored species of Tambja from Japan (Nudibranchia: Polyceridae). Venus, The Japanese Journal of Malacology,  46(1), 13-18.
  • Eliot, C.N.E. (1904)  On some nudibranchs from East Africa and Zanzibar. Part V. Proceedings of the Zoological Society of London, 1904(2), 83-105, Pls.3-4.
  • Yonow, N & Hayward, P.J. (1991) Opisthobranches de l'Ile Maurice, avec la description de deux especes nouvelles (Mollusca: Opisthobranchia). Revue francaise d'aquariologie, 18(1), 1-30, Figs1-13.

Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Nov 22). Comment on Tambja morosa? from Pemba, Tanzania by Wilhelm van Zyl. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15252


Tambja morosa

Related messages

  1. Feeding Tambja morosa in New Zealand
    From: Samuel Kemp, May 17, 2007
  2. Tambja morosa from East Timor
    From: Nick Hobgood, December 11, 2006
  3. Tambja morosa from Bali
    From: Johan Samsom, August 11, 2006
  4. Tambja morosa from Davao, Philippines
    From: Carlos R. Munda, August 9, 2006
  5. Tambja morosa from the Philippines
    From: S├ębastien Lenglet, July 8, 2006
  6. Tambja morosa from Gold Coast, Queensland
    From: Ian Banks, June 10, 2006
  7. Re: Tambja morosa from Sulawesi
    From: Francesco Ricciardi, April 16, 2005
  8. Tambja morosa from southern Queensland
    From: Gary Cobb, November 12, 2003
  9. Tambja morosa - new locality?
    From: Ron Greer, July 26, 2003
  10. Tambja kushimotoensis from Taiwan
    From: Todd Garthwaite, July 24, 2003
  11. Head & sensory organs of Tambja morosa
    From: Bill Rudman, July 24, 2003
  12. Tambja morosa swimming
    From: Sarah Heaney, April 5, 2003
  13. Tambja morosa from Vanuatu
    From: Vinka Stenhouse, March 23, 2003
  14. Juvenile of Tambja sagamiana?
    From: Tomoki Ueda, January 21, 2003
  15. Tambja morosa laying eggs
    From: Mary Jane Adams , December 20, 2002
  16. Tambja morosa from Indonesia
    From: Sabine Noack, September 27, 2002
  17. Tambja morosa from Sulawesi
    From: Mary Jane Adams, June 10, 2002
  18. Tambja morosa from Papua New Guinea
    From: Marli Wakeling, November 12, 2001
  19. Tambja cf morosa from the Philippines
    From: Erwin Koehler, January 5, 2001
  20. Tambja morosa from Queensland
    From: Stuart Hutchison, October 8, 2000
  21. Tambja morosa from Thailand
    From: Narongpon Sittithaweepat, April 10, 2000
  22. Re:Tambja morosa in New Zealand
    From: Ross Armstrong, April 2, 1999
  23. Tambja morosa from New Zealand.
    From: Ian Skipworth, January 24, 1999

Show factsheet and all related messages