February 26, 2003
From: Alexei Chernyshev
Thanks for your comments. Unfortunately, I only have this photo and brief information from Mr. Ratnikov that the nudibranch mollusk was found in the south part of Peter the Great Bay in depth about 5-7 m. Doto is a new genus for the mollusk fauna of Russian coast of the Sea of Japan and I have sent this photo to you in the hope to identify this species (if it is possible).
As I said earlier, this species certainly looks similar to the one Baba identified as Doto pita. But Doto pita is a species from the tropical west Atlantic, so it as most unlikely resident of the much cooler waters of the Sea of Japan.
I wish it were easy to identify species of Doto but they cause problems inmost parts of the world, including the North Atlantic where they have been studied for 150 years. Clearly the external shape and colour is important, but only if considered in conjunction with the internal anatomy and aspects of their natural history, such as their food preferences. Although they can be irritating to identify they are certainly an exciting group to study in depth.
Doto sp. from Sea of Japan
From: Alexei Chernyhev, February 8, 2003
Doto cf. pita from Japan
From: Nishina Masayoshi, August 7, 2002
Doto cf. pita from The Japan Sea
From: Shigeru Hayashi, August 2, 2002
Doto pita? from Hachijo Japan
From: Shouichi Kato, June 29, 2002