What snails are these?

[krollins]

I found these on a youtube video and was wondering what they where.

 

[Brit’s Fish]

I found these on a youtube video and was wondering what they where.

I believe they’re Zig Zag Periwinkles? I see them on @reefcleaners and I think these are the same guys.

Edit: Yep, those are the ones. https://www.reefcleaners.org/aquarium-store/tank-cleaners/zig-zag-periwinkles-detail

 

[krollins]

Okay, thanks.