ZOA's migrating?

[dcelrod2011]

I have a paly rock that I have had prob 7-8 mos when I got it it only had a few polyps now the rock is covered but I noticed it has 3 what looks like ZOA's pods growing on it. I do have ZOA's in my tank but none of the rocks are touching each other can they actually be ZOA's that some how got on the paly rock?

 

[homer1475]

I have one small zoa rock that my emerald crabs love to dig at, and sometimes tear a polyp or two off and send floating(not purposely, their just clumsy buggers). I've noticed that if the polyp lands on one of my rocks in a safe place so it wont float away again. it will attach and start growing. I have several small colonies of these zoas all over my tank.