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It is Oxynoe sp. 2 in IPN at page 67:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp.
Let me quote the description:"This species can be recognized by its small conical papillae, lightly colored notum and blue spots. It could be a color variety of Oxynoe viridis, but further study is required."
I will keep it for now separate as Oxynoe sp. 02.