June 9, 2000
From: Atsushi Ono
It is 13mm long and I found them at 5m depth on a coral reef at Kerama Is. near Okinawa in Japan.
firstname.lastname@example.orgOno, A., 2000 (Jun 9) Thorunna speciosus from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2467
This is definitely T. speciosus but I don't think the other two photos you sent are colour variations of this species. Even if the orange border could vary to white, in T. speciosus there is always a break in the band on each side at the front of the mantle alongside the rhinophores. In the other animal, which I have tentatively called Thorunna cf. speciosus, there is no break in the white band bordering the mantle.