Phyllidia Nudibranch

Thanks Blogie and Gerardo for the suggestions. Have to agree that the Phyllidia is confusing. Been checking sea slug forum, nudipixel and starfish.ch but can't seem to find an exact match. Though P. elegans seems like a good candidate. What is throwing me off though is that it only has 2 yellow-capped tubercles and that it has rather thick black lines. Most verified pictures of P. elegans have more yellow-capped tubercles and thinner lines. Or maybe this is a P. exquisita? except that unfortunately I wasn't able to get another picture showing the front to see if there is a yellow edge on the mantle margin.

I don't think so Marta. This was too round and not flat like the pancake nudi.