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Nembrotha sp. 08  Genus: Bergh, 1877

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This is an undescribed or unidentified species of the genus Nembrotha. I call it Nembrotha sp. 08, to distinguish it from other species of Nembrotha.
Nembrotha sp. 08 is chracterized by its dark brown background colour, by the bright blue margin of the foot, by greenish-turquoise pustules with pink pigment, by greenish-turquoise rhinophore pockets with pink pigment, and by greenish-turquoise gills.
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."
This species was originally posted at these websites as Nembrotha sp. H  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.
pretty similar are:
Nembrotha livingstonei which has a distinctive white cross-like mark between the rhinophores, and differs by the red colour of the rhinophores and gills
Nembrotha sp. 02 which differs by bright blue rhinophores and gills,
Nembrotha sp. 04 which diifers by a black background colour, by black rhinophores and gills, and black rhinophore pockets with an orange margin,
Nembrotha cf. yonowae which has a white patch at the base of each rhinophore pocket, and lacks the bright blue margin of the foot