Nudibranch on Caulerpa taxifolia

August 18, 2003
From: Tim Glasby

Dear Bill,
To accompany my message on Elysia on Caulerpa taxifolia, here is a photo of another nudibranch found on C. taxifolia in Botany Bay (Sydney, Australia) at a depth of 3 m. Do you happen to recognise it?
All the best,
Tim Glasby

Glasby, T., 2003 (Aug 18) Nudibranch on Caulerpa taxifolia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Tim,
This is the aeolid Spurilla australis . It feeds on sea anemones. I have found it feeding on the little brown anemone Cricophorus nutrix. It is interesting because it is one of a group of nudibranchs which have evolved a symbiotic relationship with zooxanthellae [see Solar powered Sea Slugs Pages], but I'm afraid I can't think of any way it could help with the Caulerpa problem.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Aug 18). Comment on Nudibranch on Caulerpa taxifolia by Tim Glasby. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Spurilla australis

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