Vittina natalensis

Vittina natalensis, known as the spotted nerite, red spotted snail or zebra nerite, is a small freshwater snail with an operculum, an aquatic gastropod in the nerite family Neritidae. It is endemic to the coastal plain of East Africa, with records from Kenya, Mozambique, Somalia, South Africa and Tanzania, and its species name refers to the Natal region of South Africa. Although the adults live in fresh water, the snail returns to brackish water to reproduce. It is a popular aquarium animal because its striped shell is attractive and it eats algae, though it can only breed in saltwater or brackish conditions. In the aquarium trade it is also sold as the tiger snail or zebra snail, the shell grows to about 2.5 centimetres across, and it does best at roughly 22 to 26 degrees Celsius.