Should I try to stop this coral from spreading more?

[laguest]

The small star polyps came in on a combo rock. The wife through they looked cute so I let them spread, now starting to wonder if that was a bad idea.

Should I start to limit what this coral can do?
If so how?
Anyone know what type of coral this is?

Thanks

 

[Glass Algae]

The small star polyps came in on a combo rock. The wife through they looked cute so I let them spread, now starting to wonder if that was a bad idea.

Should I start to limit what this coral can do?
If so how?
Anyone know what type of coral this is?

Thanks

Flower pot gonis?

I could be wrong tho!