Strange dorid from Hachijo Island, Japan

May 3, 2002
From: Shouichi Kato

Dear Bill,
I guess this is a dorid but I don't I have any idea about its family, or name. I found it under rocks. It looked very soft like a sponge but when I felt it it was hard.
I would very appreciate your help.

Data : under the rock, Hachijo Island, Japan. Depth: 5m, length: 30mm

Regards,
S. Kato

regulus@edit.ne.jp

Kato, S., 2002 (May 3) Strange dorid from Hachijo Island, Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6518

Dear Shouichi,
I have included close-ups of the gills and rhinophores alongside just so we can see it is a dorid and not a lump of sponge or soft coral. On first look I thought it might be Actinocyclus japonica but the gills look quite different and the skin seems to have a network of spicules rather than the smooth leathery nature of Actinocyclus. One genus which does often mimic sponges like this is Trippa but if so I don't recognise it.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (May 3). Comment on Strange dorid from Hachijo Island, Japan by Shouichi Kato. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6518

Factsheet

Unidentified - Indo West Pacific

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