Imperial Tropicals 4 Tiger Nerite Snails (Neritina natalensis) - Great for Algae and Plant Safe - Will not reproduce in fresh water! Stunning, amber, striped snails that will graze off algae and leftover food in your freshwater aquarium Will not reproduce in freshwater! These Nerites are 1/2 to 1 in diameter Completely safe with plants, shrimp, and fish One of many snails that we carry and all of our purchases come with Live Arrival Guarantees!