Thorunna australis from Lembeh

May 21, 2009
From: Sylvain Le Bris

Concerning message #14907:

Dear Bill,

This is a new record for Thorunna australis for your forum. If my ID is correct.

Locality: Lembeh, 18 m, North Sulawesi, Indonesia, Pacific Ocean, 10 April 2009. Length: 15 mm

Sylvain Le Bris

Le Bris, S., 2009 (May 21) Thorunna australis from Lembeh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Sylvain,

Yes this is T. australis. I am pretty sure the two animals have been feeding on the pale whitish sponge, [see marks in the lower photo], which has been almost completely covered by the yellow sponge. The whitish sponge is a species of Dysideawhich can be more clearly seen in Scott Johnson's earlier message [#1201]

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (May 21). Comment on Thorunna australis from Lembeh by Sylvain Le Bris. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Thorunna australis

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