Can anyone ID Please ?

[dtp]

Hi can anyone help identify, have some white stuff growing on my rock, seems to be in the more shady parts and is white. Testing showing nitrate at 2ppm and phos at 0.05. Have attached close up of it seems to be branch like rather then single hair thread.
Cheers

 

[Euphyllia97]

Following! Have the same near my gsp colony

 

[dtp]

Managed to get one with light off this morning

 

[sixty_reefer]

Hydroids it seems

 

[dtp]

Hydroids it seems

Thanks been looking and couldn’t find it , looks like a nightmare.

 

[Gareth elliott]

Bryzoans are another that grow on new live rock. Both tend to die off as the tank matures.

 

[NanoDJS]

I would not worry about them at all , these are not the type to worry about, these are more like micro sea fans more or less , I have them too on really old pieces of rock that dont move much and get shade , I have never had a tank that didnt get them after a few years .