Whitish-gray things that resemble trees or tree branches I believe they are called calcareous tube worms and a good thing to have in the tank

What are these whitish-gray things that resemble trees or tree branches

Hi Robert. I have noticed several whitish-gray things that resemble trees or tree branches. I have checked my references and I can't find out what they are. They are small(@2 cm.). Any Ideas?

Probably small feather dusters. If you touch them they will retract. Usually the have a grayish tube or live in the liverock pores.

I believe they are called calcareous tube worms and a good thing to have in the tank. They thrive on high levels of calcium.