Which nudibranch is this? (Sorry for poor photo)

[Hintermann]

During my recent liveaboard cruise to Komodo and environs, I saw one single example of an unusual nudibranch that I initially thought was a Cherlidonura varians. However, on checking the web for that species, I discovered that although the colour scheme is similar, chelidonura varians has a bare top like a flatworm and does not feature the prominent gills seen in my specimen.

Therefore, I would like someone to identify this species for me please and also tell me if I am likely to see it in Raja Ampat.

PS: Forgive the poor picture quality. The current was strong and my buddy was just below me with her expired air bubbles making photography difficult.

 

[MaxBottomtime]

It looks like Tambja morosa.

 

[Hintermann]

It looks like Tambja morosa.

Thank you. I checked the name on Google images and yes, it certainly looks like it.

I hope that I see more of Tambja morosa and also Nembrotha cristata during my trip to Raja Ampat in November.