Aquatic Arts 20 Tiger Nerite Snails (Neritina natalensis - 1/2 to 1 inch diameter) - Live Snails These snails' shells have a truly unique and beautiful pattern - they are a lovely dark amber color with small black markings that form encircling stripes. (Due to shell pattern variations, your snails may not look identical to the image provided.) These are Nerite Snails, so they absolutely never reproduce in freshwater - great for aquarium hobbyists who don't want snails reproducing in their tanks! Totally safe for live plants, live shrimp, and live fish. Nerite Snails are widely known as one of, if not the most, voracious algae-eaters out of any snail. All Aquatic ArtsTM (formerly InvertObsessionTM) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!