Pest on live rock

[Jake_the_reefer]

So I bought a display tank from my lfs that was already filled and cycled. I got it home and as I was cleaning it I noticed this weird blob on the live rock, it retracts as soon as I touch it and is growing from the rock

 

[KrisReef]

I don’t think that is a pest, but can’t see what it is on this tiny screen.

 

[jgvergo]

Maybe they are small Rock Flower Anemones? Hard to tell...

 

[Jake_the_reefer]

Maybe they are small Rock Flower Anemones? Hard to tell...

It extends out far but has no tentacles

 

[Jake_the_reefer]

Better pics

 

[Jake_the_reefer]

And more

 

[jgvergo]

Looks like it could actually be a closed up Zoa Polyp