BRISTLEWORM COLONY?

So I bought a few live rocks from my local store two months ago. Long story short there was a large bristleworm thatpoked out came out about three inches never fully came out. Now fast forward to the past week. I've noticed specifically on this one rock baby bristle worms ranging from one to five at a time they never fully come out of the rock just stick their heads out and poke around. I'm wondering is there such a thing as a colony of bristleworms?

 

Could be star fish legs too, but I have a lot of bristleworms. Their population will vary based on feeding rates. They are beneficial, IMO.

 

The biggest Ive seen in my tank is 8-10 inches. They get alot larger. If I can catch them I relocate them to my fuge.

I think I am with kevin though, its prob a colony of mini brittle starfish...
http://ep.yimg.com/ay/yhst-135990671951842/mini-brittle-stars-lot-of-10-3.gif

 

no I have brittle stars these are bristle worms. Each worm comes out of a diff area of the rock

 

Yeah, pretty common. No worries.

 

I have them, they are doing good job. I feed a lot because growing LPS ,soft corals, if you d't need them get file fish, hawk fish or stop feeding

 

I haven't fed anything in my tank as of yet they are living on w.e is in the tank

 

I had a lot of them, like moving gravel when I start feeding the corals but after adding six line wrasse to one tank and file fish to another tank I dont see them, may be stay in the rocks