Anyone ID this

[CoralKouture]

Good Morning Everyone,

I was just getting ready to do a wc and noticed this thing growing on the side of my frogspawn. Appears something is living in the shell that has grown rather large in no time. Thanks in advance for any help with an id.

 

[KJ]

Vermetid snails.

 

[CoralKouture]

Thanks

 

[JaimeAdams]

What KJ said. They can irritate coral. The best thing to do is just stick some super glue gel down in the opening.