Aquatic Arts Nerite Snail COMBO PACK - 5 Zebra Nerites + 5 Tiger Nerites + 5 Assorted Horned Nerite Snails These are nerite snails, so they absolutely never reproduce in freshwater - great for aquarium hobbyists who don't want snails reproducing in their tanks! Nerite snails are widely known as one of, if not the most, voracious algae-eaters out of any snail. Tiger and Zebra nerite snails usually range from 1/2 to 1 inch in diameter, while Assorted Horned nerites range from 1/4 to 1/2 inch. Each type of nerite snail's shells are diverse and totally unique! (Due to shell pattern variations, your snails may not look identical to the image provided.) All Aquatic ArtsTM (formerly InvertObsessionTM) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!