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Asolene spixi, also called the zebra apple snail, is a freshwater gastropod valued for its striped shell and active behavior. Despite its common name, it is not a fish, but a snail belonging to the family Ampullariidae. Its contrasting appearance, moderate size, and relatively straightforward care make it an interesting choice for a properly maintained community aquarium. Native to South America, it prefers clean, stable, well-oxygenated water. It is less commonly encountered than several other aquarium snails, giving it particular appeal to aquarists looking for a distinctive freshwater invertebrate.

General species description

Asolene spixi is a freshwater snail in the genus Asolene, recognized by its rounded shell marked with dark bands. It mainly travels across decorations, substrate, and aquarium glass while searching for food and biofilm. Its operculum allows it to close the shell opening when it withdraws. Like several ampullariids, it can use aerial respiration, although good water circulation remains beneficial in an aquarium. This is generally a peaceful species suited to a community aquarium without specialized predators. Its rarity rating of 2 corresponds to a somewhat uncommon aquarium species that is not exceptionally difficult to obtain.

Geographical origin and biotope

Countries of reference: Brazil and Argentina. Asolene spixi is associated with freshwater environments in eastern and southern South America, particularly calm or slow-moving habitats connected with the La Plata basin. It inhabits shallow water, margins, ditches, ponds, and vegetated areas where aquatic plants and decomposing plant material are abundant. The natural habitat may have clear to slightly stained water, a muddy or sandy bottom, and weak flow. In an aquarium, the main priorities are stable water, access to the surface, and plenty of surfaces for grazing rather than strong current.

Precise locality and local name

Asolene spixi is most commonly known in the aquarium trade as the zebra apple snail or freshwater zebra snail. In Portuguese, the descriptive name caramujo-maçã-zebrado may be encountered, although vernacular names vary by region. The common name refers to its relationship with apple snails and its clearly visible dark bands. In an aquarium context, zebra apple snail is the clearest common name. The complete scientific name should be used whenever several striped snails are sold under similar commercial names.

Appearance and physical characteristics

The shell of Asolene spixi is rounded to slightly conical, with a cream-yellow, beige, or light brown background crossed by dark brown to black bands. Band contrast and width may vary between individuals. The body is generally grayish brown, with long sensory tentacles and a muscular foot adapted for crawling. The shell opening is protected by a firm operculum. Adults reach only a few centimeters, allowing them to be kept in small to medium-sized aquariums when surface area and water quality are appropriate. Available calcium is important for maintaining a sound, well-formed shell.

General diet

Asolene spixi is a grazing omnivore with a strong detritus-feeding tendency. It consumes biofilm and soft algae growing on glass, leaves, rocks, and decorations, while also recovering leftover food. Supplement its diet with invertebrate wafers, blanched vegetables such as zucchini or romaine lettuce, and a regular calcium source. Natural algae in a clean aquarium should not be considered sufficient on its own. Uneaten food should be removed to prevent water quality from deteriorating. A varied diet supports growth, vitality, and the development of a durable shell.

Essential data

• Native river name: La Plata basin
• Local name used: Caramujo-maçã-zebrado
• Origin of the scientific name: Asolene is the genus name; spixi honors Johann Baptist von Spix.
• Etymology of the full name: Asolene is a generic name; spixi is a Latinized tribute to the naturalist Johann Baptist von Spix.
• Common/vernacular names: Zebra apple snail, freshwater zebra snail.
• Family: Ampullariidae
• Subfamily: Ampullariinae
• Name pronunciation: a-soh-LEE-nee SPIK-see
• Discovery: Alcide Charles Victor Marie d’Orbigny, 1835.
• Maximum adult size: Approximately 4 cm shell diameter.
• Water temperature and pH: Approximately 18 to 28 °C; pH 6.5 to 8.0.
• Watercourse appearance and surrounding vegetation: Calm or slow water, shallow margins, aquatic vegetation, and decomposing plant material.
• Typical tankmates: Peaceful dwarf shrimp, non-predatory freshwater snails, and calm community fish; avoid fish that nip at the tentacles.
• Temperament and behavior: Peaceful, most active during the day and at dusk, climbs on surfaces, and may reach the surface to breathe.
• Water depth: Shallow to moderate depth, with clear access to the surface.
• Sexual dimorphism: Difficult to identify externally; reliable identification mainly comes from observing mating behavior.
• Bottom structure and flow: Fine sand or rounded gravel, plant debris, many grazing surfaces, and low to moderate flow.

In your aquarium

To keep Asolene spixi successfully, provide stable water, a lid that prevents escapes, and open space above the waterline. Sufficient hardness and an available calcium source help prevent shell erosion. Flow should remain moderate and must not interfere with movement. Avoid aggressive fish, copper-based medications, and sudden parameter changes. Supplemental feeding, mature filtration, and regular water changes provide the best conditions for observing an active snail that remains healthy over the long term.