Bornella stellifer mating

October 9, 2002
From: Nishina Masayoshi

Dear Bill,
Here are some photos of Bornella stellifer mating and and its genital opening.

Date: 4 Aug 2002
Location: Echizen coast, Fukui prif. Japan
Lengh: 30mm
Depth: 6m
Water temp: 27C degree
Photo: M. Nishina

Best Regards,
Nishina Masayoshi

Masayoshi, N., 2002 (Oct 9) Bornella stellifer mating. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Nishina,
The close-up of the genital opening shows a ring of hooks around the genital opening. I am not sure what their function is.
Best wishes,
Bill Rudman


Bornella japonica

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