Aglajid from Kerama Id, Japan

April 26, 2000
From: Atsushi Ono

Dear Bill
Thank you for ID of Hallaxa cryptica.

I found this cephalaspid species at Kerama Is. near Okinawa in Japan. It similar to Philinopsis, but I  think it is a Philine species. The upper one is all white in color, the lower is a bit milky? and has black dots on the side of its foot and front side of head-shield. I think they are the same species...

They were found at 7m depth,  on coral rubble (I moved them to an algae to photograph, because it is difficult to see white animal on white rubble). They are 3mm long.

Could you help me to identify these?
I'm sorry for low quality of these photos.

Atsushi Ono

Ono, A., 2000 (Apr 26) Aglajid from Kerama Id, Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Atsushi,
I think your animals are most likely to be aglajids rather then philinids. The large upturned siphon-like structure in the posterior midline of the headshield is quite reminiscent of Philinopsis, though I would need to look at its anatomy to be sure.

It has some similarities to Odontoglaja guamensis but appears to be an unnamed species.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Apr 26). Comment on Aglajid from Kerama Id, Japan by Atsushi Ono. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Aglajid sp. 1

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