Nembrotha? or Gymnodoris? from Japan

October 6, 1999
From: H. Ono

Hello,
This is my first mail and question to The Sea Slug Forum.

I often enjoy fun diving at Tateyama, at the southern point of Boso Peninsula, Chiba pref, Japan (about 180km southsoutheast of Tokyo). On Sep 23th, 1999 a guide showed me a sea slug which I took a photo of.

Is this a "Nembrotha (Polyceridae)"?
Data: depth 14m,u nder the rock. water temp 25 degree. Length 50mm.

Thanks a lot,

H. Ono.

hal9001@green.ocn.ne.jp

Ono, H., 1999 (Oct 6) Nembrotha? or Gymnodoris? from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1397

Dear Mr Ono,
This could be a a species of Nembrotha or it could be a species of Gymnodoris. If you have any other photos, which show the side of the body, or the head, I might be able to have a better guess at what it is. I suspect though that we would need to look at the anatomy to be sure.
Best wishes,
Bill Rudman.

Rudman, W.B., 1999 (Oct 6). Comment on Nembrotha? or Gymnodoris? from Japan by H. Ono. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1397

Factsheet

Nembrotha? sp. 10.