Jorunna rubescens from Pemba Island

March 7, 2006
From: Wilhelm van Zyl

Hi Bill,

Another nudibranch from my trip to Zanzibar. This is one of the few species that I have not been able to identify, not even the family. I found it under a large overhang, which made it a bit diificalt to photograph properly.

Locality: Pemba island, Zanzibar, Tanzania. Indian Ocean. Depth: 15 m. Length: 10 cm. 14 October 2005. broken Coral reef. Photographer: Wilhelm van Zyl


Van Zyl, F.W., 2006 (Mar 7) Jorunna rubescens from Pemba Island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Wilhelm,
Although it doesn't look much like a Jorunna, it is Jorunna rubescens. I am interested on the spaghetti like mass it is on. I thought at first it was Sea Hare egg mass but I think it might be a sponge. We don't know what this species eats, so this might be a clue to its food choice.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Mar 7). Comment on Jorunna rubescens from Pemba Island by Wilhelm van Zyl. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Jorunna rubescens

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