ID's needed

[Beautiful_chaos]

I just recent bought a few frags.
I need ID's on both. One our puffer had decided to snack on, the other, I'm thinking was hit by RTN.
Any help (with ANY of it) is greatly appreciated!

 

[Beautiful_chaos]

Here's a little better photo

 

[reepher315]

Looks like some sort of Montipora.

 

[Beautiful_chaos]

The one that I believe had RTN.
This happened with an hour or two. It was flaking off pretty rapidly. I took it out of the aquarium, did a little research online to figure out what was going on. It's back in water (not the large aquarium) and it has stopped losing it color.
When or will I be able to safely put it back?
The last thing I want is for our other corals to get contaminated

 

[Beautiful_chaos]

Looks like some sort of Montipora.

Thanks Reefer!
Now if I can only get the puffer to quit eating it, we'll be good

 

[reepher315]

And that one looks like an acropora

 

[Beautiful_chaos]

And that one looks like an acropora

Any knowledge/experience with RTN?

 

[Frick]

The first is Pavona cactus. And it is on a ORA plug so to be more exact, if it was cultivated by ORA on that plug then it's ORA's Mint Pavona.
http://coral.aims.gov.au/factsheet.jsp?speciesCode=0289
http://www.orafarm.com/products/hardcoral/other/mint-pavona/

+1 on the Acopora sp. but for the RTN getting rid of the puffer and adding some decent water flow will help. Also make sure your big three are stable, Alk, Ca, and Mg.