New mystery snail

[TrishinRoswell]

I discovered these two new snails in my 29 gallon freshwater tank. One is on the glass and the other is hanging on a plant. I have a lot of snails that I’m trying to get rid of with assassin snails, but I’ve never seen any this large before. They’re bigger than most of my assassin snails even. I have not added any new plants or fish and at least a few weeks so I have no idea where they came from. Any idea what they are? should I keep them?

 

[Essjay]

They look like a species of ramhorn snail, species vary from tiny 'pest' snails around 1/8 inch size to their larger cousins up to an inch or two. Yours are obviously not the tiny ones! it's up to you whether you keep them. People pay money for the coloured varieties, though yours seem to be brownish.
They probably arrived as eggs on a plant, it does take a while for the eggs to hatch and the snails to grow to that size.

 

[Colin_T]

squash them

 

[TrishinRoswell]

So a follow up question. Since I really don’t think I want to keep them if they show up again lol but since they seem to be bigger than my assassin snails, I’m guessing the assassin snails will not kill them. Is that true?