What is this white stringy stuff?

[SaltyGirlMom]

Please help ID this white stringy stuff that seemingly appeared overnight. I’ve been searching the net but I’m not seeing anything that looks exactly like it. Seems it’s attached on one end and the other sways with the water flow.

 

[papercrab]

Hydrozoas?

 

[Isaac Alves]

Could it be Spionid worms...like you see in this picture:

Spionid Worm

I have Spionid worms in my tank. I know for the most part they are harmless but they are starting to get out of control. I know most people suggest glue them and they die off. I have been gluing them for the most part when they are on my rock but i have a bunch in my sand bed and other various...

www.reef2reef.com

 

[papercrab]

Do they have kind of a hairy side or are they smooth. If its got kinda like cillia allong the side that might suggest digitate hydroids. If not id go with the latter suggestion of spionod worm

 

[SaltyGirlMom]

Thanks! Looks cilia-like. Doesn’t match those exactly tho.