Deformed Elysia ornata from Japan

July 9, 2002
From: Jun Imamoto


Dear Bill.
I recently saw as shocking a sea slug as the Chromodoris orientalis in Mr. Tomohiko Kurihara's recent message. At first, I thought that it was a pair copulating, but on checking it was a single deformed Elysia ornata. Because the sea was rough, I couldn't do a detailed observation.

Date: 22 June 2002
Location: Futou, Suruga bay, Japan
Size about: 35mm
Depth: 3m
Temperature: 20 C

Best Regards,
Jun Imamoto

imamoto@wips.co.jp

Imamoto, J., 2002 (Jul 9) Deformed Elysia ornata from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7435

Dear Jun,
Another interesting find for the Abnormalities Page. It seems to be an example of what we would call 'Siamese' or 'conjoined twins'. In the very early stages of development the egg did not completely divide into two, and each partially separate cell continued to develop as though it was a single individual. I find it hard to imagine how it survived as a planktonic veliger larvae and metamorphosed into its slug form, but clearly it has. An interesting, if somewhat bizarre, find.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Jul 9). Comment on Deformed Elysia ornata from Japan by Jun Imamoto. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7435

Factsheet

Elysia ornata

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