Risbecia pulchella - range extension

March 14, 2001
From: Michael D. Miller

Dear Bill
Attached you will find a photo exhibiting "trailing" behavior by two different species of Risbecia, Risbecia pulchella [yellow spots] and Risbecia tryoni [purple spots]. Perhaps the most significant aspect of the image is a further southerly range extension of Risbecia pulchella from Thailand (Sea Slug Forum) into Indonesian waters.

Location: Tulamben, Bali, Indonesia
Date: Oct. 2000
Depth: 20 ft.
Photographer: Michael Miller
Cheers;
Mike

mdmiller@cts.com

Miller, M.D., 2001 (Mar 14) Risbecia pulchella - range extension. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3975

Dear Mike,
A very interesting photo [I have also posted larger versions of each animal from the photo]. I guess the trailing happened in a dish? It suggests the chemical attractant which apparently causes 'trailing' in species of Risbecia is not that different between species. It is also nice to get a fuller idea of the distributions of some of these species we thought were restricted to the western Indian Ocean.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Mar 14). Comment on Risbecia pulchella - range extension by Michael D. Miller. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3975

Factsheet

Risbecia pulchella

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