Re: Hydatina zonata from Japan

August 13, 2001
From: Nishina Masayoshi

Dear Dr.Rudman,
I also wonder, as you do in your discussion, whether these three species are just colour forms of one species. They are similar to each other. Hydatina physis is common at Hachijo. Though there are so many H. physis, I've never seen H. zonata and H. physis together at the same place. I will ask this question to S. Kato of Reglus Diving to make it sure.

I've never seen Hydatina cinctoria before at Hachijo.

Best Regards,
Nishina Masayoshi

Nishina, M., 2001 (Aug 13) Re: Hydatina zonata from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Nishina,
Bill Rudman


Hydatina zonata

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