Well, I removed the rock and pulled it off without popping it. Was going to take a picture off it, then pop it and take a pic of whatever (if anything inside) however my camera battery is dead. It will have to wait. I left it in the bucket, so maybe it will keep ok til then.
Also, after pulling the rock, I discovered my little friend was not alone. There were several green and red bulbs on the back, only much smaller. This would lead me to the thought that popping is not required for them to spread...I removed what I could and placed it back into tank. Some of the smaller ones, did get popped while I was removing them.......so I will let you know if they start showing up elsewhere.
Otherwise, when my frag tank finishes cycling, I will frag the whole thing and dispose of any rock with bubbles left on it.