Nembrotha livingstonei - different colour forms

September 5, 1999
From: Julie Marshall

Dear Bill,

Last week several colour forms of Nembrotha livingstonei were illustrated on your Forum, in your answer to a question from Japan. Attached are two other variations found at Heron Island, Great Barrier Reef. I have found over 20 specimens of this species at Heron Island ranging from 10 mm to 60 mm. Whilst most of the animals are the same as the animal you illustrated as specimen A, a couple of my animals had a bright yellow cross-shaped patch between the rhinophores rather than white. The other animal differs more markedly having a dark green body and prominent orange pustules. The patch round the gills and the cross shaped patch between the rhinophores is a very pale greyish-green. This animal was 10 mm and was found in November 1998 on bryozoans attached to a grid protecting a saltwater intake pipe at 13 metres on the south side of Heron Island.

Best wishes
Julie Marshall

Marshall, J., 1999 (Sep 5) Nembrotha livingstonei - different colour forms. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Julie,
I am not 100% sure they are all the same species but certainly the ones I have looked at show no internal anatomical differences.
Bill Rudman.

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