PROBLEM SOLVED!!!!

What is it, Occam Razor? The easiest answer is the right one?

Ok, as mentioned above, I had moved a frag of zoes leaving the majority behind as it had grown onto the rock. Nearby there was another plug with some lime green palys. The next morning both colonies were gone. No trace.

Well last night I noticed two zoas and two palys poking around what I thought was a cleaned off frag disk.

I picked up the disk and discovered that my bench pressing crab must have pushed up the lime green frag disk which in turn fell on top of my red zoas, obscuring both.

So I am a bit embarrassed to say that my big tizzy about something eating my zoas turned out nothing more than me jumping to a conclusion. Sorry to have taken your time folks.