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Pretty similar is:
Flabellina sp. 02 Genus: Voigt, 1834 , which differs by a brownish body with white spots, purple rhinophores with white spots, by brownish cerata, and by purple oral tentacles with white spots.
It is Facelinid sp. 2 in IPN:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp. at page 399
The pictures #4 and #5 were originally misidentified and posted on 30 July 2011 at these websites as Trinchesia sp. 16, because it is very difficult to see the incomplete annulae of the rhinophores on those pictures, I thought they were smooth. I changed it on 7 August 2011.
How to cite:
Köhler, E. (2016), published 18 October 2016, Facelinidae sp. 04 Family: Bergh, 1889
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Facelinidae_sp_04.htm