Snail ID

[Krzydmnd]

Reposting with my intended title (but still, good evening!) ...

So I have hundreds of these little white Snails that only come out at night for a few months now but tonight I saw these black Snails that I've never noticed before. Any idea what they are?

Also only coming out at night.

 

[SAPPER]

Looks like it could be a Columbellidae, a dove snail.

 

[Krzydmnd]

I did some more research last night and found this... I did have some whelks that were sold to me as nasarrius about 5 month ago ago. I took them out of the tank about a month ago because I want to get a clam. I believe these little guys are baby whelk, they look just like the snail in the right below. Threw me at first because I did not see snouts . Ugh.