Geweihschnecke Tricolor (Clithon sp.)

05 October 2026

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Geweihschnecke Tricolor is a trade name for a colourful horned nerite in the genus Clithon. Exact species identification is uncertain because several closely related Clithon species and colour forms are sold under similar names. These small algae-grazing snails suit mature freshwater aquariums with stable, mineral-rich water. They are generally peaceful, plant-safe and unable to establish a large population in ordinary freshwater, although they may leave small white egg capsules on hard surfaces.

Taxonomy and identification

The supplied name refers to Clithon sp., a genus-level identification rather than a confirmed species. Clithon belongs to the nerite snail family Neritidae. Common features include a rounded shell, a strong operculum and, in many forms, short shell projections or horns. Shell pattern and horn development vary considerably, so the trade name Tricolor should not be treated as a formal taxonomic rank.

Natural habitat

Clithon nerites are associated with tropical streams, rivers and connected coastal waters in the Indo-Pacific region. They graze on algae and biofilm on submerged rocks, wood and other firm surfaces. Many species have a life cycle involving brackish or marine conditions, which explains why their larvae generally do not develop in a normal freshwater aquarium.

Aquarium conditions

Use a mature, covered aquarium with abundant natural biofilm and algae-covered hard surfaces. Provide smooth and rough surfaces for grazing, gentle to moderate circulation, good oxygenation and stable water quality. Avoid sudden changes in temperature, pH or hardness. Neutral to alkaline, moderately hard water helps reduce shell erosion; copper-based medications and other copper exposure are dangerous to snails.

Feeding

The main diet is algae and aufwuchs naturally growing on glass, rocks, wood and equipment. In a clean or newly set-up aquarium, supplement with algae wafers or sinking foods containing suitable vegetable matter. Blanched vegetables can also be offered occasionally. Remove uneaten food promptly. A persistently spotless aquarium may not provide enough food, and starvation can be difficult to detect.

Plant safety

Clithon nerites normally rasp algae and biofilm from surfaces rather than healthy plant tissue. They are considered plant-safe and are suitable for planted aquariums. They may crawl over leaves and can disturb very delicate or poorly rooted plants, but they do not normally cut or consume vigorous healthy foliage. Ensure that plant treatments contain no copper or other snail-toxic substances.

Reproduction

Adults may lay conspicuous white egg capsules on glass, rocks, wood, filter parts and decorations. In ordinary freshwater, these eggs do not normally produce a growing population because the planktonic larvae require specific brackish or marine conditions. Successful breeding therefore requires specialist control of salinity, food and larval rearing; simply keeping several adults in freshwater is usually insufficient.

Population control

Population growth in freshwater is usually self-limiting, but unwanted adults and egg capsules can be removed by hand. Scrape capsules from hard surfaces during maintenance and rehome surplus snails where possible. Do not release aquarium animals outdoors. Avoid copper treatments and improvised chemical controls, which can harm other invertebrates, fish and the aquarium environment. Managing food availability also helps prevent excessive accumulation of snails.

Compatibility and care notes

These peaceful snails can be kept with non-aggressive community fish and other peaceful invertebrates. Avoid loaches, puffers, large predatory fish and animals that deliberately attack snails. A secure lid is useful because nerites may climb above the waterline. Acclimate slowly, inspect for inactivity after transport and maintain calcium and carbonate availability for shell health.

Snail info

Temperature : 22–28 °C
pH: 7.0–8.5

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