Geweihschnecke Red Venom (Clithon sowerbianum)

03 October 2026

The Red Venom Geweihschnecke is a striking horned nerite sold for freshwater aquariums. Its dark shell, red-orange bands and small projections make it distinctive, although trade names and shell patterns can overlap among Clithon species. It is mainly a grazer of algae and biofilm, is generally safe with healthy plants, and usually cannot establish a self-sustaining population in freshwater because its larvae require different conditions.

Geweihschnecke Red Venom (Clithon sowerbianum)

Taxonomy and identification

The supplied name is Clithon sowerbianum. Identification should be treated as provisional because Geweihschnecke and Red Venom are trade names, and several Clithon nerites can have similar banding and shell projections. The animals shown have a rounded nerite shell with horn-like projections and dark coloration marked by red-orange bands and pale spots. Confirming the species from photographs alone is difficult.

Natural habitat

Clithon nerites are associated with tropical streams, rivers and estuarine transitions in the Indo-Pacific region. Adults commonly graze on hard surfaces in flowing, well-oxygenated water. Their life cycle includes a dispersive larval stage, so freshwater aquarium adults should not be assumed to represent a completely freshwater-breeding population.

Aquarium water and setup

Use a mature, stable aquarium with good oxygenation, smooth rocks, wood and other surfaces that can support natural biofilm. Keep ammonia and nitrite at zero and avoid sudden changes in temperature, pH or hardness. Neutral to moderately alkaline water is preferable, with enough carbonate and general hardness to support shell maintenance. Avoid copper-based medications, which are toxic to snails. A secure lid is useful because nerites may climb above the waterline.

Feeding

The main diet is naturally growing algae, diatoms and biofilm on glass, stone and décor. Do not add a large group to a newly set-up or excessively clean aquarium where food is scarce. Offer algae wafers or other invertebrate-safe foods when natural growth is insufficient, and remove uneaten portions. Blanched vegetables can be used occasionally, but food should be supplied sparingly to avoid water-quality problems.

Plant safety

This type of nerite is generally plant-safe. It scrapes surfaces rather than actively eating healthy leaves, so it is suitable for planted aquariums. It may graze on algae growing on leaves and can disturb very loose floating plants while climbing. Damage to plants is more likely to result from poor nutrition, decaying leaves or another species than from normal feeding by this snail.

Reproduction and breeding limits

Individuals have separate sexes and may mate in freshwater. Females can deposit small, hard, pale egg capsules on rocks, wood, glass and equipment. In typical freshwater aquariums, the larvae do not develop successfully because Clithon reproduction involves a free-swimming stage associated with brackish or marine conditions. Eggs may therefore remain visible even when no juvenile snails appear. Successful captive rearing requires specialized control of salinity, food and larval culture, and should not be expected in an ordinary community tank.

Population control

Freshwater populations normally remain limited because recruitment fails, but the number of adults can still be controlled by removing unwanted snails by hand and avoiding unnecessary purchases. Reduce excess feeding while preserving enough algae and biofilm for the animals being kept. Inspect new décor and plants for egg capsules, and remove capsules if their appearance is undesirable. Never release snails, eggs or aquarium water into natural waterways. Avoid chemical snail killers, especially copper products, because they can harm the intended inhabitants and other invertebrates.

Compatibility and care notes

Keep with peaceful community fish and non-predatory invertebrates. Avoid puffers, loaches and other animals known to attack or consume snails. Provide stable water chemistry, a mature food source and gentle acclimation. A snail that remains inactive for a long period should be checked carefully for signs of life rather than immediately removed, since nerites can rest for extended periods.

Snail info

Temperature : 22–28 °C
pH: 7.0–8.2

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