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Nembrotha sp. 02  Genus: Bergh, 1877

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This is an undescribed or unidentified species of the genus Nembrotha. I call it Nembrotha sp. 02, to distinguish it from other species of Nembrotha.
Nembrotha sp. 02 is chracterized by its black background colour, by bright orange-red spots, and by a bright orange-red marginal line at the anterior part of the mantle. The gills vary from bright bluish to black. The rhinophores are relatively thick and short, and vary in colour from bright blue to dark blue, the elevated rhinophoral sheaths are black, in some specimens with an orange-red margin.
It is one of a group of similarly coloured species which are still a bit of a puzzle. There may be a number of species, or just some which are very variable in colour. Let me quote Bill Rudman:" There still seems to be some work needed on these red-spotted nembrothids."
It was originally posted at these websites as Nembrotha sp. B  Genus: Bergh, 1877.
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 though '01' looks a little bit stupid, and now is only the genus italic written.
More information on Nembrotha sp. 02 as Nembrotha spp? are on Bill Rudman's Sea-Slug Forum!