Tiny Tube Worms? Or Something Else?

Yes, and probably a little more with shipping. Being a gift, I didnt want to ask.

I have now noticed the exact same white hair looking things in my tank. Did you ever find anything else that narrowed it down?

 

These are, in fact, a type of hydroid. I have some very similar ones in my tank. They have not caused any harm however, but on occasion do irritate a people-eater colony (not enough to actually do any harm).

You probably got them from one of the hermit's shells, just like this: http://www.google.com/imgres?imgurl=http://img116.imageshack.us/img116/989/somethingonhermitcrabpj4.jpg&imgrefurl=http://www.reefcentral.com/forums/showthread.php%3Fs%3D%26postid%3D13725515&usg=__O35hiXk_wJ90NnGmndRudTz8aqA=&h=188&w=234&sz=9&hl=en&start=10&zoom=1&tbnid=vnryEoDd7t4jaM:&tbnh=145&tbnw=186&ei=R2DMTYmuFY2gtwf7i42TBQ&prev=/search%3Fq%3Dhydroids%2Bshell%26um%3D1%26hl%3Den%26safe%3Dactive%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-USfficial%26biw%3D1245%26bih%3D464%26tbm%3Disch0%2C180&um=1&itbs=1&iact=hc&vpx=169&vpy=207&dur=162&hovh=150&hovw=187&tx=114&ty=176&page=2&ndsp=12&ved=1t:429,r:0,s:10&biw=1245&bih=464

 

How did you find this out? Do you have a link? hopefully...

Just saw the link when I refreshed...thanks evolved

 

Edited with a messy link...

 

Hydrozoans

 

Thanks for the link, eveolved. How many times was that image magnified? lol. Mine are so dang tiny. I have a LOT of them though on the one rock.

 

Bingo.

Antennellopsis sp. - Very narrow single strand colonies. N. Sulawesi images.

 

Is there anything specific which I should be concerned about?

 

I've left mine just be, as they haven't caused me any grief. I looked into the matter pretty hard once I finally figured out what they were. All the removal methods weren't worth the risk or effort, considering they weren't doing anything "bad". I've also read they disappear for some people, without a solid cause.

I'd just keep on any corals near them.

 

Ok, I will watch it. Could I just move the single rock to the fuge and have no worries? I don't see it on any other rocks - perhaps this could prevent any further spread of the hydroids?