hydroid or something else?

[mmfreeman56]

Hello, I have several of these whitish, transparent "worms" that extend and retract and hang out in the current. They do not seem to have a hard spiny base, they just extend directly out of the live rock. This one seems particularly irritating to the zoas. My son thinks they are hydroids. Hopefully not...

[Sir Patrick]

Look like hydroids to me.

[larryandlaura]

+1 on the hydroids. Parma MI! I have done a few grids over there.

[mmfreeman56]

Look like hydroids to me.
dang...are they going to cause a big problem, do I leave them be or try to get rid of them? If so, how do I do this?

[Tom@HaslettMI]

Don't panic just yet.

I think they're "something else"... and a harmless something else at that. I just checked my reference books (where I recalled reading about these) but did not find anything there. I'll keep looking and will post whatever I find.

I've had these for years. Never more than a few here and there.

Tom