Is this GHA?

[NatureHold]

I know there are hundreds of different species of GHA, but I wanted some feedback on if what I have is GHA before I buy a sea hare to try to get rid of it. I am wanting to try to naturally win the fight with algae instead of dosing to correct by reducing nutrients and adding natural GHA eaters.

Does this look like GHA? It looks more "complex" and branching than what I see posted here frequently.

 

[carmodpg]

The second to last picture made it seem as though there was some sort of a root structure, buts its hard to tell. If there is a root structure, its probably not GHA. It almost looks like it could be a type of bryopsis. Can you pluck it easily?

 

[NatureHold]

The second to last picture made it seem as though there was some sort of a root structure, buts its hard to tell. If there is a root structure, its probably not GHA. It almost looks like it could be a type of bryopsis. Can you pluck it easily?

There isnt really a rooting structure, more just a single point of contact to the rock. If you can find it, the whole puff of algae comes off in one chunk. Some of them are attached in multiple places though. I thought that it looks very similar to bottle brush algae, just shaped differently.

 

[Kmartinez]

I'm in the same boat, is this more like bryopsis? It is very difficult to pull out and is everywhere. It all appears the same (minus the turf algae), it is one hair then splits to a y. This is an older pic, as I have extracted multiple times each water change. And added more cuc. I'm afraid of reef flux, being a newb. The turf has left mostly, it's just the hard stringy algae left. Is this bryopsis? I'd imagine GHA to be thinner and not so course, but this is from pics and videos of Brs.
Thanks for the help!