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I think it is most probably Eubranchus ocellatus (Alder & Hancock, 1864) [Eolis], but I can't see enough details for a positive identification.
How to cite:
Köhler, E. (2016), published 8 October 2016, Eubranchus sp. 14 Genus: Forbes, 1838
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Eubranchus_sp_14.htm