Polyps, Polyps and..yes! more Polyps...

[sumpfinfishe]

The first pic is standard green button polyps, the second a brown botton variety, the third however looks to me like it's either majano in the forground and aiptasia in the background, both of which will cause serious outbreaks and will eventually take over your entire tank

The first two will spread at a normal button polyp rate, which can be fast in the right conditions so it's just personal preference whether or not you desire to have lots of polyps everywhere.

As for the later ones, I would nuke them all
Use some boiling RO water with kalkwasser and syringe them all.
If they are a true majano you can also pickup a small chocolate chip starfish, these starfish simply love majano anemones