Please help ID what this is. Algae, pest, critter???

[Luv2play01]

Anyone know what is growing underneath my bubble coral. It started several months ago when I got my bubble coral. Its only growing on that rock and is starting to spread slowly. Not sure if it's an algae of some sort or a pest. Any info would be appreciated.

 

[Nibejeebies]

That would appear to be 100s... maybe 1000s of tiny little fan worms (feather dusters)

If you look very closely long enough Id say you will see one of the fans.

 

[ahiggins]

I dont disagree with you but I also see some sort of growth under my LPS that sort of look like these. its branching and looks calcareous but not living. I see it on live rock from the store as well.
These look a lot smaller than what I normally see though.
Great camera by the way, amazing details

 

[Tahoe61]

Possible Bryozoans, harmless.

 

[Roboson]

Could be a type of foraminifera. I know they have a white variety, but I'm not very familiar with it.

 

[saltyfilmfolks]

Heres a link, try to compare

http://www.lionfishlair.com/hitchhiker.shtml

 

[Khalifa Alhaddad]

Thanks for the link @saltyfilmfolks