Chromodoris? charlottae from Eygpt

September 26, 2005
From: Kamal El Tawil

Dear Bill:
I found this nudibranch last week in the southern Egyptian Red Sea. Glossodoris or Chromodoris charlottae? in your may 30th, 2005 message [#13868] you were decisive: Chromodoris. maybe my pictures would be of help.

Locality:  Shouna, Marsa Alam, Egypt. Red Sea. Depth: 15 meters. Length: 4 cms. 16 September 2005. Photographer: Kamal El Tawil

Best regards

El Tawil, K., 2005 (Sep 26) Chromodoris? charlottae from Eygpt. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Kamal,
Thanks for these photos. I am afraid the external shape is often not a good indicator of genus, although some species such as Glossodoris atromarginata, have a very recognisable shape, easily identifiable as oe group of Glossodoris. The intersting thing about the early photos were that they showed mantle-flapping, a behaviour known only from some species of Chromodoris, which made me look at the description of the anatomy more closely. That's why I decided it was a Chromodoris rather than a Glossodoris. One thing you might add to your list of 'things to look out for' is the greenish yellow 'sponge' your animal is on. I am not even sure it's a sponge but on the offchance that it is, could you look out next time you see this species to see if the same 'sponge' is nearby, or of closer 'interest' to the slug.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Sep 26). Comment on Chromodoris? charlottae from Eygpt by Kamal El Tawil. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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