Are these nudibranches?

[Lineatus]

Well, my first attempt at keeping SPS in my nano was unsuccessful. After a few months of clinging on my forest fire digi has started to bleach and die (to be honest I think the nudis (?) where the least of its worry’s)). I’ve started noticing white furry spots on the coral, are these nudis?
I’m thinking of leaving the skeleton in the tank as I think it would look appealing if my zoas continued grew over it. But should I remove it if there’s nudis? There’s no other sps in this tank, I only have softies. Should I be worried about adding SPS in the future? Can the eggs/ nudis remain in the tank for a while without food?

 

[Reefkeepers Archive]

They look like montipora eating nudibranchs, as the name suggests they eat montipora. @ISpeakForTheSeas any knowledge on treatment?

 

[ISpeakForTheSeas]

Yeah, those are nudibranchs - more specifically, they're Phestilla subodiosa, also known as Montipora Eating Nudibranchs (MEN).

Some wrasses are known to eat them; I've also heard of using Camel Shrimp (Rhynchocinetes durbanensis) in a QT tank for a few days (I'd probably suggest 3-4 weeks, depending on the severity of the infestation, but that's a guess and not from experience) to take care of the infestation.*

That said, manual removal is also an option - you can remove any adults and eggs you can find; the eggs take ~2 days to hatch and ~8-10 days to settle/turn into mini versions of the adults, so you have basically 10 days between batches you can remove.**

I've heard that dips work on the adults as well, so that's an option to remove the adults (this won't get rid of the eggs though, so you still need to take care of them after the larvae settle).

*Source:

Untitled 1

**Source:

https://www.researchgate.net/publication/365776957_Morphology_Feeding_Rate_and_Larval_Settlement_Preference_of_the_Corallivorous_Nudibranch_Phestilla_subodiosa_Nudibranchia_Trinchesiidae_from_Hong_Kong