ampullariidae, the apple snails, is a family of large freshwater snails. it is the largest species of snail. apple snails are most commonly found in africa, south and central america, west indies, southern usa, and asia, but can be found all over the world. they are well adapted to their region and therefore can also be sold as pets and bought at most pet stores in the us. apple snails are the preferred type of pet snail because of their appearance and size. apple snails are also called golden mystery snails, golden snails, and mystery snails.