Barnacle or something on snail shell?

[Bitcoin Reefer]

What the heck is this. It looks like a snail on my snail but doesn’t move and is hard stuck to it I think.

 

[blaxsun]

Could be. Could also be something else (hard to see).

 

[Crabs McJones]

Slipper limpet maybe

 

[Bitcoin Reefer]

Slipper limpet maybe

Looking at photos online they don’t seem to have the same texture. Maybe though. Thank you!