A spotted Roboastra gracilis

August 8, 2000
From: Mary Jane Adams

Hi Bill,
Can you ID this one? I found it crawling over coral in a mostly rubble bottomed bay in Mary Island, Solomon Islands. Black body with orange spots, blue-gray gills, lamellate purple rhinophores, gray foot.
Depth: 8 meters Crawling length: 24 mm November, 1997

Thanks!
Mary Jane

mjadams@earthlink.net

Adams, M.J., 2000 (Aug 8) A spotted Roboastra gracilis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2835

Dear Mary Jane,
I am pretty sure this is a colour form of Roboastra gracilis. I suspect the yellow-orange spots in this animal are in grooves, which in other specimens are completely yellow.

Have a look at Lindsay Warren's photo from Sulawesi, which shows an intermediate colour form. There are a number of names for orange or red spotted species which may all refer to the same species.
Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Aug 8). Comment on A spotted Roboastra gracilis by Mary Jane Adams. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2835

Factsheet

Roboastra gracilis

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