What is this on my Zoas?

[Prlopezc]

I noticed this on my Zoas, does anyone know what this is?

 

[s_tooz_123]

I noticed this on my Zoas, does anyone know what this is?

If the shell is hard, it might be a vermetid snail

 

[NoohpyT]

If the shell is hard, it might be a vermetid snail

I'd second this

 

[Prlopezc]

I'd second this

Thanks both!