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Cyerce bourbonica is translucent marbled greenish, covered all over with black and yellow spots. There are also pale violet patches at the outer margins of the cerata.
The specimen of the pictures #9 and #10 does not fit the description ecactly, the orange patches are very faint, and there are no black spots or markings on the head, Nathalie Yonow wrote:"It could be bourbonica, orange and black are very fickle colours in sea slugs..."
There are more pictures of Cyerce bourbonica online from La Réunion and from Japan.
It is Cyerce sp. 3 at Bill Rudman's Sea-Slug Forum.
It was posted on 10 June 2007 at these websites as Cyerce sp. A Genus: Bergh, 1871,
on 29 July 2011 changed into Cyerce sp. 01 Genus: Bergh, 1871,
for some genera, such as Trinchesia was the alphabet almost through. I had to change the distinguishing alphabetic character into a number. I have chosen 2-digit numbers, even if '01' looks a little bit stupid, and now is only the genus italic written.
More information on Cyerce bourbonica are on http://species-id.net/wiki/Cyerce_bourbonica!