Identifying these mushroom looking guys

[Tony757]

So I got live rock for my buddy of mine and added it to my tank to seed my dry Rock and I noticed these things that look like little mushrooms growing does anybody know what this is

 

[James M]

Looks like bleached button palys

 

[Tony757]

Looks like bleached button polys

Ohh okay is that a good thing and is there a way to help these guys.

 

[reef lover]

Since theyre coming back id say your doing fine already.