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Nembrotha sp. 06  Genus: Bergh, 1877

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This is an undescribed or unidentified species of the genus Nembrotha. I call it Nembrotha sp. 06, to distinguish it from other species of Nembrotha.
Nembrotha sp. 06 is chracterized by its reddish background colour, by whitish-cream longitudinal bands, by lighter red spots, and by blue pigment at the posterior end of the foot, the 'tail', and at the oral tentacles. The gills are brownish-red, with a large white patch at their bases. The rhinophores are also brownish-red, the elevated rhinophoral sheaths are reddish. There is a white patch between the rhinophores.
Very similar is:
Nembrotha cf. mullineri which differs by the lack of blue pigment at the 'tail and the oral tentacles.
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. F  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 informations on Nembrotha sp. 06 as Nembrotha spp? are on Bill Rudman's Sea-Slug Forum!