babylon snails

Hi Guys can anyone help me with an ID of these baby snails which have appeared in my tank. I’ve seen approx 3 grazing on top of my rocks. I haven’t seen any snails laying eggs so not sure if it’s hitch hiked in on some frags. In the tank I have a couple of turbos, Astraeas and Babylon snails.

So I got two babylon snails... What has everyone's experience been like with babylon snails. Have you had any problems with them... You know eating other things you didn't intend for them to eat? Also I initially didn't think I wanted clams... At least not yet, so I thought I'd be OK. But now...