The Horned Nerite Snail is named for its horn like appendages on its shell. The shell of the Horned Nerite Snail is very sturdy, with the horns providing them a defense mechanism against fish trying to eat them, or even human beings during handling. It is an extremely docile creature and does not bother any other inhabitants. They clean algae off of glass, plants, and decorations, they eat hair algae, and they keep your substrate clean and the correct color.