Homoiodoris japonica from Hong Kong

June 19, 2007
From: Felix Poon

Dear Doctor Rudman,

Could you please identify this species? It has many green warts. Its egg ribbon is orange-yellow.

Locality: Shek Ngau Chau, Hong Kong,  6 May 2007, On rock at 7 m. Length: 8 cm. Photographer: Felix Poon

Thanks
Felix Poon

ifex@hotmail.com

Poon, F., 2007 (Jun 19) Homoiodoris japonica from Hong Kong. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19988

Dear Felix,
This is what I have identified as Homoiodoris japonica, but I see on the web that at least two species have been given this name. There is little scientific literature on the species but I am pretty sure yours is the 'correct' Homoiodoris japonica. Although hard to see in your photos there is a brownish purple patch at the tip of the tubercles.

I suspect the red sponge is its food, as in Japan it has been reported to be found near a red sponge called Halichondria japonica but I can't confirm the sponge identification.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jun 19). Comment on Homoiodoris japonica from Hong Kong by Felix Poon. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19988

Factsheet

Homoiodoris japonica

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