Aquatic Arts 3 Blue Mystery Snails (Pomacea bridgesii - 1/2 to 2+ inches) (Algae Eaters) - Live Snails All Aquatic ArtsTM (formerly InvertObsessionTM) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners! One of the largest plant-safe freshwater snails, Mystery Snails are a popular and attractive addition to any aquarium. Can grow to over 2 inches - one of the largest freshwater snails in the aquarium hobby. These mystery snails are a calming sky blue color, and make a beautiful and elegant addition to any aquarium. Cleans aquariums by eating uneaten fish food and other waste.