Tiny shells

[Bluereef12]

I have these tiny white spirly shells all over the glass any idea what they are? Thanks.

[Ryphen]

Look up spirorbid worm and see if the picture matches. That's what your description sounds like to me.

[MARINECRITTERS]

Look up spirorbid worm and see if the picture matches. That's what your description sounds like to me.

+1, harmless

[Bluereef12]

That looks like them but there alot smaller than they look in the pics. I guess everything starts out small..