• Alexander

Jessica5348

This is indeed a mollusk, specifically a snail. It's called Stomatella. I had quite a few of them in my aquarium, plus some coal-black ones. Don't worry, they are very useful creatures. They feed on detritus and various growths.

Brandon9634

Here -

Susan

Thank you, definitely a stomatella) one is 3 cm, the other is slightly larger, probably a juvenile))