Help identifying white growth on rock

[Impavidus]

Aiptasia? They are grouped so close together and I’m not sure aiptasia grows like that.

Not the best of pictures. This is the only place I see this growth in the tank.

 

[JGT]

Pic isn’t clear but appear to be hydroids.

 

[MaxTremors]

Doesn’t look like aiptasia to me.

 

[Impavidus]

Yeah, the more I look it looks like hydroids

 

[Impavidus]

I put some putty over the small patch