Need Help Identifying plz!!

[Reef-Ready]

Hey fellow aquarius. I need some help, I have a 150g tank. Trying to figure out what this is on my glass. It a hard white spiral looking thing. All over my glass. I believe them to be vermetid snails.

 

[James M]

spirorbid worms, harmless filter feeders

 

[Reef-Ready]

Thanks James!!