A very small Risbecia tryoni

September 13, 2000
From: Atsushi Ono

Dear Bill,
I found a juvenile of chromodorid species.
This is similar to C. leopardus and Risbecia tryoni.
Which is correct identification?
To my regret, I didn't take a specimen.

8mm long, at Kerama Is. near Okinawa in Japan. At about 7m depth on coral reef.

Sincerely,
Atsushi Ono

ononini@cosmos.ne.jp

Ono, A., 2000 (Sep 13) A very small Risbecia tryoni. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3018

Dear Atsushi,
At 8mm long, this is indeed a very juvenile animal. I am pretty sure this is Risbecia tryoni from its general shape and the pinkish tinge to the white mantle gland at the front of the mantle. The glands in R. tryoni often look like this, even in much larger animals.

Best wishes,
Bill Rudman

Rudman, W.B., 2000 (Sep 13). Comment on A very small Risbecia tryoni by Atsushi Ono. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3018

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Risbecia tryoni

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