Re: Jorunna rubescens from the Philippines

August 26, 2008
From: Marcel Tanke

Concerning message #15253:

Dear Bill,
Last week we saw 2 Jorunna rubescens at the Anilao Twin Rock and Coala dives sites. The one in the first picture we saw during a nightdive. While looking at the pictures and also comparing with pictures on your site, I noticed that some J. rubescens have a "long, brown shaped face", while others have a "shorter, more round face in the color pattern of its body". As the 2 in the pictures attached.

Do you think this is a significent difference, or just one of the variation within the species? Later we also found eggs in that area, that I believe are from J. rubescens.

Locality: Anilao, Twin Rock and Coala sites, about 10-15 meters, Philippines, July 8 and 11, 2008, Sandy area within the reef. Length: 15 cm. Photographer: Marcel Tanke.

Best regards,

Tanke, M.A., 2008 (Aug 26) Re: Jorunna rubescens from the Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Marcel,
I am sure the darker and lighter 'faces' are well within the normal variability of the species. I have included a couple of close-ups before to show the spiculate papillae [caryophyllidia] - which are one of the reasons that this nembrothid-like dorid is placed in the genus Jorunna - but the close-up alongside, from one of your photos, shows the caryophyllidia much better.

I agree that the egg ribbon is most probably that of Jorunna rubescens.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Aug 26). Comment on Re: Jorunna rubescens from the Philippines by Marcel Tanke. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Jorunna rubescens

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