Madrella sp. 01 Genus: Alder & Hancock, 1864
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Because of the distinctive rhinophores am I pretty sure that this is a species of the genus Madrella Alder & Hancock, 1864, though Dr. Alicia Hermosillo-González labeled it "Janolus from kirby.JPG".
But I can't see enough details for a positive identification, I guess it is probably Madrella gloriosa Baba, 1949,
because of the blue pigment on the cerata.
I see no caruncle, and the rhinophores are surely not Janolus like.
How to cite:
Köhler, E. (2016), published 24 November 2016, Madrella sp. 01 Genus: Alder & Hancock, 1864
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Madrella_sp_01.htm