May 14, 2002
From: Nishina Masayoshi
I've the opportunity to discuss with Pamun, Yamada, Kinoshita, Kurihara, etc... their observations on Pseudobornella orientalis.
P.orientalis is often found on sandy bottoms in Spring. It is not a rare species in this period at Osezaki beach, Izu. Most times they were found on sands. It is easier to find it at night time than during the day so ir may be a nocturnal animal.
The average length of an adult is between 20mm to 30mm. When P. orientalis is fully grown, their mantle becomes like a film like an octopus has. P. orientalis can use it for floating. Kurihara has a good photo. It shows the film-like mantle. P. orientalis seems to live on or in the sand, and it may swim or float underwater occasionally with the film-like mantle. Some animals dislikes the light of a
flashlight and bury in the sand but some of them don't seem to notice.
P. orientalis is rarely found on the hydroid Tubularia mesembryanthemum but it does not seem to eat it. From Kurihara's observation, the thread on the rhinophores retracts and shrinks when something (like a floating minute animal) touches it but then it immediately extends out as it was.
firstname.lastname@example.orgMasayoshi, N., 2002 (May 14) Information on Pseudobornella orientalis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6861
It is indeed a fascinating animal. As I said to Tomohiko Kurihara I am pretty sure the film-like flaps, which as you say do remind us of an octopus, are the edge of the foot rather than the mantle. In these animals the 'edge' of the mantle is represented by the row of 'cerata/gills'.
New observations on Pseudobornella orientalis
From: Song Xikun, June 19, 2006
Re: Is this Pseudobornella orientalis?
From: Song XiKun, October 24, 2005
Is this Pseudobornella orientalis?
From: XiKun Song, October 20, 2005
Re: Pseudobornella orientalis from Philippines
From: Tomohiko Kurihara, March 25, 2004
Pseudobornella orientalis from Philippines
From: Shinji Kitagawa, March 19, 2004
Pseudobornella orientalis from the Japan Sea
From: Shigeru Hayashi, July 15, 2002
Pseudobornella orientalis from Izu Penisula, Japan.
From: Haruo Kinoshita, May 14, 2002
Pseudobornella orientalis from Japan
From: Tomohiko Kurihara, May 1, 2002
From: Nishina Masayoshi , April 16, 2002