Baby coral growing and can't ID

[Timich]

I have this really small coral growing on my rock. There's 2 other ones like it on a different rock. I cannot tell what it is. It looks kinda like a blasto or maybe even a doughnut/scoly coral. But I'd have no idea how a scoly would be even growing in my tank. It has tissue like lps that moves in current. Couldn't find anything online with "baby" corals to compare to.

 

[blaxsun]

Mushroom?

 

[Sharkbait19]

Looks like a blasto. Any tentacles? Might be a hound majano but it really does look like blasto.
Where was the rock from? Any blasto already in there?

 

[A Young Reefer]

looks like some sort of blasto , a some what nice color too .

 

[Timich]

Looks like a blasto. Any tentacles? Might be a hound majano but it really does look like blasto.
Where was the rock from? Any blasto already in there?

From a buddy. Rebleached dry rock he hadn't used for ever. We bleached and washed alot of times before use. Only a chalice was on that rock in my tank. I placed one and over time it embedded itself into it before I had to remove it. Now have goni above that thing growing.