Mushroom question

[MermaidTail]

Hey all- beginner question here...I'm very curious about the way in which mushroom corals grow.
Not in terms of time...etc, but more so the movement and growth of them.

I often see them spread out over rocks. I have two really cool acid green mushrooms in my tank right now from my LFS and they're doing great, and are way more fun to watch/monitor than I thought they would be. They're really active and have nice movement, but they're next to each other on a rock. Will they spread and cover surrounding areas? Do they disperse themselves? Or do I have to place a mushroom every area I want them?

Forgive me if this sounds dumb- beginner!

Thanks!

 

[Psiber_Syn]

Most shroom i have mom moves and leaves a part of itself and a baby grows just like in real life lol