Jorunna funebris on a blue sponge

March 24, 2001
From: Mary Jane Adams

Hi Bill,
Here is another picture of Jorunna funebris on a blue sponge. It was sitting high off the reef on a long branch of the sponge. Milne Bay, Papua New Guinea, October, 1992.
Best regards,
Mary Jane

divepng@yahoo.com

Adams, M.J., 2001 (Mar 24) Jorunna funebris on a blue sponge. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4030

Dear Mary Jane,
Thanks for another record. I think there is a case for assuming that either one, or a number of very similar-looking blue sponges is/are the preferred food of Jorunna funebris. A species of Xestospongia [see references below], has been identified as its food, but so has a similar blue sponge that I had identified as Euplacella cf. australis [Haploscleridae: Callyspongiidae]. I am afraid there are too many sponges and too few sponge taxonomists at present to solve all these food identification problems at the moment, but hopefully if we continue to collect data (and specimens where possible), some time in the future we will get the problems sorted out.

• Gulavita, N. K., Scheuer, P.J., & De Silva, E.D. (1991) Antimicrobial constituents of a sponge-nudibranch pair from Sri Lanka, pp. 229-233. In: Thompson, M.-F., Sarojini, R., & Nagabhushanam, R. (Eds.). Bioactive compounds from marine organisms with emphasis on the Indian Ocean. An Indo-United States Symposium xvii + 410 pp. Oxford & IBH Publishing Co., New Delhi.
• Kubo, A, Kitahara, Y. & Nakahara, S. (1989) Synthesis of new isoquinolinequinone metabolites of a marine sponge, Xestospongia sp., and the nudibranch Jorunna funebris. Chemical & Pharmaceutical Bulletin, 37(5): 1384-1386.
• Karuso, P. (1987) Chemical ecology of the nudibranchs, pp. 31-60. In: Scheuer, P.J. (Ed.), Bioorganic marine chemistry, vol. 1: vii + 185 pp. Springer-Verlag, Berlin.

Best wishes,
Bill

Rudman, W.B., 2001 (Mar 24). Comment on Jorunna funebris on a blue sponge by Mary Jane Adams. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4030

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