Need Help Id'ing!!

[standup]

please help me ID this- they showed up first a few weeks ago in like 4 or 5 of them, but now there all over my rock, and i dont know what they are... are they aptasia?

 

[standup]

heres a closer look:

 

[jeo]

I can't tell from the pic what you need to be ID'd

 

[thomas712]

Are you talking about the fiberous growths on your live rock?

 

[standup]

yes, very much so- there startin to freak me out, theyve completely taken over the rock

 

[standup]

that would b insane- there r so many of them- and they spread like wild fire

 

[bdhough]

its probably just a filamentous algae growth. Its nothing to worry about. I have them too on the undersides of my rocks. I'm not sure but i think hermits and snails will eat it...

 

[j21kickster]

might be hydroids but they are so small- but then again mine started out like that