what are these?

[Joeysmissy]

these are growing fast..and in numbers..i could only get a good pic of two of them...they are kind of feathery like...but they do not sway..and they are different colors...one of them comes out of a tube attached to the live rock..know what they are? and are they safe to leave in?

 

[Cathic]

Either the start of Featherdusters or a Cluster Duster colony. OR the dreaded A word Aptasia would be my guesses. Id wait for the pros opinion though.

Upon a closer inspection I would say Featherduster.

 

[PRC]

Look like featherdusters.

 

[reeffreak]

Tube worms,feather duster worms,fan worms=reef safe and beneficial.

 

[Cathic]

Good hitchhikers they are, grats on em.

 

[Bifferwine]

Yep, featherdusters.

 

[yote]

I concur.
Those are feather dusters.