March 12, 2007
From: Napas Golf
Is this Roboastra arika?. It has tri-colours, different from the book and from others I had found. The second picture is from Komodo).
Locality: Upper photo: Similan Island, 20 m, Thailand, Andaman Ocean, 14 Feb 2007, Wall. Length: 1.5 inches. Lower photo: Komodo Island, Indonesia. Photographer: Napas Golf.
firstname.lastname@example.orgNapas Golf, 2007 (Mar 12) Roboastra arika? from Similan Thailand. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19614
The animal Bob Burn described as Roboastra arika is almost certainly a synonym of R. gracilis. Unfortunately Burn based his description on a preserved specimen which had no accompanying photo. The animal which has been mistakenly identified as Roboastra arika in the popular literature, is in fact a species of Tambja, which has recently been named Tambja victoriae. From photos such as yours, we can say that this species is quite variable in colour.