January 25, 2005
From: Ian Skipworth
I think this is Caldukia rubignosa. I sent you a photo of another one a few years ago but this is a better photo. I've seen three of these on the last few dives at the Knights. One of them was much more lightly coloured but still the same slug I think.
Locality: Poor Knights Islands, NE New Zealand. Depth: 10m
Length: 12 mm.15 January 2005. rocky reef
Photographer: Ian Skipworth
firstname.lastname@example.orgSkipworth, I., 2005 (Jan 25) Caldukia rubignosa from New Zealand. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12961
Always good to get a bit of colour variation. I have included a close-up from your photo alongside to show the large bulbous swelling on the back of each rhinophore, which seems characteristic of Caldukia. The photo also shows the single branch of the digestive gland which runs up the centre of each ceras.