Flabellina riwo from Hachijo Is., Japan

July 31, 2002
From: Shouichi Kato

Dear Bill,
This animal was found on a rocky reef, 10m in depth. I sent this picture to Mr. Ono and he advised me this animal was Flabellina riwo. It was 35mm in size, characterized by its very large oral tentacles. Their motion was very interesting to me.

Best Regards,
S. Kato

regulus@edit.ne.jp

Kato, S., 2002 (Jul 31) Flabellina riwo from Hachijo Is., Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7668

Dear Shouichi,
I guess the oral tentacle motion you found interesting was the way it 'flaps' its paddle-like oral tentacles up and down as it crawls along. As I mentioned in an earlier message, this species and Flabellina bicolor both have this behaviour, but I have never seen anyone else ever mention seeing it. I am glad someone else has now reported it as I was beginning to wonder if I had dreamed it.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Jul 31). Comment on Flabellina riwo from Hachijo Is., Japan by Shouichi Kato. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7668

Factsheet

Flabellina riwo

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