Invested?! Need ID please

[Tn23]

Hi guys,

Was doing a water change tonight and flipped over one of my corals/rocks and noticed it was invested with these white bubbles... I touched it and they popped very easily.

I took a closer look and I noticed some small baby pod like things inside them... they looked kindof like eggs....... however there's nothing in that tank since its my frag tank and there is only a 6 line wrasse, stary blenny, and arrow crab.

If anyone could ID these for me that would great, I hope they aren't pest... or I'm going to toss that rock out ASAP. Pictures attached and thanks in advance!




If you look closely you can see the tiny eyes/bodies forming....