November 26, 1999
From: Valda Fraser
What is the "red thing" on this Halgerda ? I hope you will be able to help.
Locality: South Coast KwaZulu-Natal, SOUTH AFRICA. Scottburgh - Rocky reef - 20m. November 1999. Size of Halgerda: 50mm
email@example.comFraser, V., 1999 (Nov 26) What is this 'red thing' on Halgerda?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1585
Your 'red thing' looks quite like a flatworm but I don't think it is.
I think it is a benthic, or bottom-dwelling ctenophore. Have a look at the page I have just prepared on these strange animals - I don't often have an excuse to show my photo of these animals. There are two reasons why I think it is a ctenophore, not a flatworm. See the two white eye-like rings? I think they are the pores through which the feeding tentacles are shot out. Secondly you can clearly see a network of tubes throughout the tissue. If you look at my photo of Coeloplana sp? you will see an identical network of tubes.
Any other views, agreeing or disagreeing are welcome.
Bill Rudman.Rudman, W.B., 1999 (Nov 26). Comment on What is this 'red thing' on Halgerda? by Valda Fraser. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1585
Benthic ctenophores from Bali
From: Supapong Areeprasertkul, October 27, 2008
Benthic ctenophore from Bali
From: Ovidiu, June 20, 2006
Re: Aglajid eating a benthic ctenophore
From: Brian Francisco, January 14, 2006
Can you identify this one?
From: Karen Christensen, January 12, 2006
A benthic ctenophore from the Philippines
From: Mabel Fang, February 24, 2004
An organism on Caulerpa prolifera
From: Levent Cavas, December 19, 2003