White spots on Zoa frag

[trembsreef]

Hey guys, I’ve noticed these white speckles on my Scrambled eggs Zoa frag. It’s been happy in my tank and has grown several heads since purchasing it. Any idea on what these guys are?

 

[samnaz]

spirorbid worms

 

[trembsreef]

spirorbid worms

That’s what I was thinking but I wasn’t 100% sure. Will they harm the Zoa?

 

[SHNICI]

usually they are completely harmless, only can harm the mechanical part in your system if they overgrow.