Planorbella duryi, common name the Seminole rams-horn, is a species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.

The species is endemic to Florida and is found frequently in home aquariums.

These colours are: This species of snail is endemic to the freshwater ecosystems of the US state of Florida.

[3] Fossils of the species have been found dating back to the Piacenzian, in the Tamiami formation.

Some people consider them pests due to their ability to breed very fast and overpopulate.