This species is very rare in Kerama Is. [near Okinawa], in Japan. I saw only one individual at bottom of a bay in May, 1999. 7mm long alive. PHOTO: Atsushi Ono.
I initially suggested this may be a species of eubranchid, mainly because of the shape of the cerata. See Atsushi Ono's message below. However I now think it may be Baeolidia japonica. See my comments below.
• Baba, K. (1933) Supplementary note on the Nudibranchia collected in the vicinity of the Amakusa Marine Biological Laboratory. Annotationes Zoologicae Japonenses, Tokyo, 14(2): 273-283.
• Baba, K (1949) Opisthobranchia of Sagami Bay collected by His Majesty The Emperor of Japan. Iwanami Shoten, Tokyo. 194pp., 50 Pls.
Rudman, W.B., 1999 (December 23) Baeolidia japonica Baba, 1933. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/bergjapo
Baeolidia sp. from sthn Queensland
From: Gary Cobb, November 27, 2009
Re: Baeolidia japonica from Japan.
From: Jun Imamoto, August 10, 2002
Baeolidia japonica from Japan.
From: Jun Imamoto, August 9, 2002
Berghia japonica? from Kerama Is
From: Atsushi Ono, December 23, 1999
Re: Limenandra nodosa? from Kerama Is
From: Atsushi Ono, August 19, 1999
Limenandra nodosa? from Kerama Island
From: Atsushi Ono, August 13, 1999