What is on my Zoa???

[Amandakayphoto]

Hello R2R! Hoping someone can help identify what is on my zoa:

 

[tjohnson3]

Looks like a zoa eating nudi… any way to pull it out and get a better photo against a white background?

 

[Amandakayphoto]

I haven't had a chance to get a better picture, but it hasn't moved at all in 24 hours- would nudis behave like that?

 

[Amandakayphoto]

So I pulled the plug and dipped it again and took a little brush to the area. It didn't move it all, so I took a tweezer and pulled those spots off- they were like a tough hardened calcified sliver... super weird. Thoughts?

 

[thatmanMIKEson]

What happened next?

 

[Amandakayphoto]

What happened next?

Hey! So I pulled off that spot and it was hard/calcified. Placed the zoa frag back in the tank, and has been doing great, nee growths, etc. so I don't think it was anything bad. No clue what it was, but all seems well!