Ramshorn snails are freshwater snails known for their distinctive coiled shells, which resemble a ram's horn. They belong to the family Planorbidae and are commonly found in ponds, lakes, and slow-moving rivers. These snails play an important role in aquatic ecosystems by helping to break down organic matter and providing food for various predators. These snails are typically small, ranging from 1 to 3 centimeters in diameter. They are herbivorous, feeding on algae and decaying plant material. Ramshorn snails are popular in the aquarium trade due to their unique appearance and ability to help maintain water quality.