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Very similar is Marionia sp. 12 Genus: Vayssière, 1877, the specimen #1 was misidentified and posted on 19 November 2014 at these websites as
Marionia distincta Bergh, 1905, it differs by the purple colour of the secondary gills.
More informations on Marionia distincta are at Michael D. Miller's Slug-Site!
How to cite:
Köhler, E. (2016), published 14 December 2016, Marionia distincta Bergh, 1905
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Marionia_distincta.htm