"I think this individual is Chromodoris preciosa because, if one magnifies the photo and looks hard at the very edge of the mantle, there is a faint white marginal band. This band is difficult to observe in most places because it is in deep shadow. Certainly the speckled mantle with minute pustules are identical with those of Chromodoris preciosa."
Comment from Richard Willan
I think this individual is Chromodoris preciosa because, if one magnifies the photo and looks hard at the very edge of the mantle, there is a faint white marginal band. This band is difficult to observe in most places because it is in deep shadow. Certainly the speckled mantle with minute pustules are identical with those of Chromodoris preciosa.