Something came with my zoas?

I picked up this rock with some nice orange center zoas,but I noticed when i got home there was a white hard looking thing on the back/underside of the rock(hard to get a good pic)..put it in the tank and noticed it has what looks like little flower type polyps that come out on one side kinda blueish in color..I will try to get a better pic when halides come on,but will also have to try and get my brothers camera.I used my cell as its all i had at the time..just would like to know if its bad,good,etc..thanks in advance..8)

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sorry.heres the pic
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please any ideas..there seems to be a couple parts that are still alive.just wondering if i could save it? if not no prob as i will just leave it in there and see how it goes.

 

wow nice score! keep it in front of a strong water current, and close to the lights, whatever it is, it's a keeper, now what it is exactly don't know, other than being a hard coral favites,of some sort!?!?.

 

ok well i tried to get better pics.if you look at the zoa in the center, then look slight left,you can see the little polyp looking things coming from the white hard coral...oh i also busted it off the rock with the zoas so its by it self(well except the two little zoas that came with lol)

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bump

 

favites!is my guess. soo awesome!

 

ok a little up date.still not sure what it is but its growing and lookin good...my question is can i break off the dead parts without hurting the new parts..

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Looks like an alveopora or a goniopora. I don't think it will be as easy to break off the dead parts as you think it is but if you can, the living part of the coral should be fine, as long as you don't damage it in the process.

 

cool thanks AMCARRIG.would it be ok if i just let it be the way it is..i`ll look up some care tips, but if you have any let me know..