What are these things on my Live Rock?

I have two things that i cannot identify on my live rock. in picture number one, i have a small white tube (which is affixed and never moves) protruding off of my rock. it shoots out a long white thread (4 or 5 inches) and slowly reels it back in. ( i only have a picture of it with the long thread in, not out) pic on left

next, i have these growths on my rocks that look like roots and every few inches there is a white feather duster shape growth. pic on right

any explanations?
thanks
JP

 

vermatids on the left
fan or tube worms on the right

the latter is great IME
The former can cause issues to corals placed close by - I had a leather coral that was irritaded by the thread coming across it
you can snap them off or cover them with a dab of putty or glue if this happens

Steve

 

steve, what is great about the fan/tube worms? they are not bad, correct. are there any beneficials? or negatives?

i will snap off the other thing.

thanks for your help

JP

 

they are filter feeders, and attractive IMO - hence I think they are great

I was fortunate enough to get some red feathered ones on my last set up

Steve