Ceratosoma tenue from Sth Korea

May 30, 2003
From: Dong Bum Koh

Dear Bill,
Here is a photo of Ceratosoma tenue that I took at Moon islet, Cheju Island on 18 May 2003.
5m depth. W/T:17 degrees

May be its useful scene understanding of foot actions.

Thank you very much for your kind comments.

Best regards,
Dong Bum Koh

drkoh@seasee.co.kr

Koh, D.B., 2003 (May 30) Ceratosoma tenue from Sth Korea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10002

Thanks Dong Bum,
At this angle I can only guess that it is Ceratosoma tenue rather than Ceratosoma trilobatum. The foot on most molluscs is shaped to crawl on flat, or reasonably flat surfaces, but when they are on a very narrow object such as this stalk, the edge tend to fold around the narrow object so that the snail or slug stays attached, not just through gravity and the stickiness of the mucous trail, but through the muscles on the edge of the foot grasping the stalk much like we would do with a thumb and forefinger. Slugs and snails that always live on narrow plant stalks or plant-like animal colonies often seem to produce a stickier mucus whih I assume helps them to stay on their food even in strong currents.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (May 30). Comment on Ceratosoma tenue from Sth Korea by Dong Bum Koh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10002

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