Any idea what this is growing on zoas?

[JustinTanks]

Just noticed these little things growing next to my zoas. Really hoping they aren’t aiptasia!

 

[messytank]

hydroids of some sort?

 

[ying yang]

I think hydroids. Ive got some on gsp that bought.
Definately not aiptaaia that i can see in picture.

 

[JustinTanks]

They’re the very clear stringy things. Never seen them before but I hope they’re good and not bad haha