Pyramid snails on astrea

[Vested]

Fairly sure these are pyramid snails, they only seem to be on my astrea snails though not red banded thought that was interesting.. another plus for red banded?

 

[Dan_P]

Fairly sure these are pyramid snails, they only seem to be on my astrea snails though not red banded thought that was interesting.. another plus for red banded?

Are these bad?

 

[Vested]

Are these bad?

Definitely if you see them on clams, I believe they attack the foot. It didnt seem like they where bothering the astrea that much although them just being alive means they are getting food somewhere.

I removed as many as I could find