Click the thumbnail photos to enhance!
Pretty similar is Kaloplocamus ramosus (Cantraine, 1835) [Doris], which has the same body colour, but differs by relatively short lateral and velar appendages.
Let me quote IPN at page 106: "This widespread species needs further study to determine whether it is a single species or a complex of several distinct ones."
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426 pp.
There are pictures of similar specimens at NUDIPIXEL from Flores, Indonesia, and from Puerto Galera.