Re: Feeding in Hypselodoris festiva

September 4, 2002
From: Jun Imamoto

Dear Bill,
I found this sea slug in a tide pool at the beach. It was feeding on a sponge I think may be Halichondria okadai. While observing this I noticed a strange movement of this sea slug similar to that reported in a recent message by Masayoshi Nishina. Then, I discovered the tentacle which pokes out from under Halichondria okadai, and seems to attack Hypselodoris festiva. I don't think the sponge has such a tentacle. I suspect it belongs to a creature which probably lives with Halichondria okadai.

I am happy if these reports are useful for your research.

Date: 24 Aug 2002
Location: Shimoda, Izu Peninsula, Sagami Bay, Japan
Size: About 20mm
Depth: 0.3m (Intertidal)
Temperature: 26C

Best Regards,
Jun Imamoto
http://umiushi.zive.net/

imamoto@wips.co.jp

Imamoto, J., 2002 (Sep 4) Re: Feeding in Hypselodoris festiva. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7858

Thanks Jun,
I suspect from the hairs and joints that this 'tentacle' is a leg of a crustacean. It ceratinly isn't making life easy for the Hypselodoris.
Best wishes,
Bill Rudman

Factsheet

Hypselodoris festiva

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