This is an undescribed species of the genus Nembrotha. I call it Nembrotha sp. D,
to distinguish it from other undescribed Nembrotha sp.
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.
More informations on Nembrotha sp. D are at
Bill Rudman's Sea-Slug Forum!
