Anna's Chromodoris (Chromodoris annae) with parasite
Tanjung Paudean, Lembeh.
It is the same pair of nudis as in the previous pic but in this pic you can see that the nudi below has a parasite in its gills, probably a copepod (Poecilostomatoida). It is the two white appendages seen among the orange gills of the nudi.

''Chromodoris annae'' is a species of sea slug, a very colourful nudibranch, a shell-less marine gastropod mollusc in the family Chromodorididae.
Similar species: Sea Slugs
By Patomarazul
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Uploaded Aug 19, 2018. Captured May 18, 2018 09:29 in Unnamed Road, Paudean, Lembeh Sel., Kota Bitung, Sulawesi Utara, Indonesia.