What is this?

[S.SReefer]

Howdy all.
So I've just returned after my vacation, after heavy inspection I spotted these.

I know the environment I'm creating is full of amazing little creatures. Is this a friendly critter or does anyone know what this it.

My tanks still going through the cycle. Green stage on my live rock. I noticed on my hammerhead coral there was something growing on my frag.

 

[Gtinnel]

It’s kinda hard to tell from the pictures but are they little hard coiled tubes? I’m guessing they’re vermetid snails.

 

[S.SReefer]

Correct they were I got bumblebee snails although I don't see a difference.

Thank you

 

[VintageReefer]

Correct they were I got bumblebee snails although I don't see a difference.

Thank you

The bumblebee snails will eat the inner worm but leave the spiral shell behind

 

[Sophie"s mom]

It’s kinda hard to tell from the pictures but are they little hard coiled tubes? I’m guessing they’re vermetid snails.

Yep! That was my thought as well.