Doto from Singapore

February 1, 2005
From: Debby Ng

Dear Dr Rudman

Uma Sachidhanandam referred me to you regarding the identification of the nudibranch attached with this email. It sits on a giant hydroid. Several people have guessed this as Thecacera picta because I think a certain guide book features a similar-looking animal.

The nudi was photographed in Pulau Hantu, Singapore, an island south of the mainland by Paul Tan. The depth was appx. 10 m, and the time was 12:30pm, on 14 Nov 2004. The nudi's are laying eggs upon a giant hydroid.

Heaps thanks,
The Hantu Blog

Dear Debby,
This is a nudibranch but not Thecacera. It is a species of Doto, almost certainly what has been called in various picture books, Doto bella. I guess it feeds on this hydroid. As I discuss on the accompanying Fact Sheet, I don't think this is Doto bella. It is probably an unnamed species, but as we know from the species of the North Atlantic, we need to know not only about the anatomy of these species but more about colour variation and food choice before we can sensibly differentiate them. Unfortunately in the past too many species have been named on poor descriptions based on one or two specimens. At this stage I will call it Doto sp. 9.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Feb 1). Comment on Doto from Singapore by Debby Ng. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Doto sp. 9

Related messages

  1. Re: Doto sp. 9 from Singapore
    From: Debby Ng, February 1, 2005

Show factsheet and all related messages