Mystery Snails are one of, if not THE most popular freshwater snails in the aquarium hobby, and for good reason! They are highly unique in appearance with their large and colorful shells, their iridescently marked bodies, and their swaying tentacles. These snails, which come in several different colors, are particularly excellent for adding decoration to any aquarium, but they also make themselves extremely useful by vigorously cleaning up waste and excess food! Mystery snails are among the largest freshwater snails in the hobby, growing to a maximum diameter of 2 inches or more. Mystery snails will lay their eggs outside the water.