Help on ID this coral

[Hector Fajardo]

need help, bought this but the seller couldn’t tell me the name. Also one on the left is sliding, is it safe to remove it and replace it?

Or just let it be?
Thank you

 

[JaimeAdams]

Hairy Mushroom. As a corallimorpharia they have a foot and can move themselves or let go of the substrate if unhappy.