Aiptasia or Hydroids or ?

[Cherry Bomb]

I was told it may be anthelia.

Hmmmm not sure as they don’t seem as long? It looks like an Octocoral of some sort. A diving site said it was this but? I’ll look more in a bit but don’t have a solid answer yet. Mine seems pretty invasive as it is all over the rocks. Doesn’t seem to be bugging the Palys though.