Identify a growth in tank

[beginnerreefer04]

So been fighting gha and Dino’s since going fallow due to ich and today while inspecting the tank I noticed these spikes growing on my rock. It’s almost looks like the spines on a tuxedo urchin haven’t seen Dino look like that yet.

 

[MoshJosh]

Stems with white "puffs" on top appear to be colonial hydroids?

 

[beginnerreefer04]

Stems with white "puffs" on top appear to be colonial hydroids?

Doesn’t look like any photos I see online but could just be younger than the photos online. I’m going to just remove rock and scrub away at them

 

[Oiseaufeu]

I had something similar to this, but couldn’t take any photos of them and now they’re completely gone.

 

[MoshJosh]

If it is this section here you are referring too, these look like some type of hydroid to me:

Like these dudes: