Clithon sowerbianum (Red Venom Horned Snail)

11 April 2026

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Meet the Red Venom Horned Snail (Clithon sowerbianum), a striking and highly sought-after addition to any freshwater aquarium. Known for its dramatic black shell adorned with fiery red and orange bands, this tiny algae-eating powerhouse not only keeps your tank spotless but also adds a stunning visual contrast.

Clithon sowerbianum (Red Venom Horned Snail)

Overview

The Red Venom Horned Snail, scientifically known as Clithon sowerbianum, is a highly prized invertebrate in the aquarium hobby. Renowned for its voracious appetite for nuisance algae and its spectacular shell coloration, it is an ideal cleaning crew member for nano and planted aquariums. Because of their peaceful disposition, they can be kept with a wide variety of fish and dwarf shrimp.

Image of geweihschnecke red venom clithon sowerbianum

Distribution and Habitat

This species is native to the coastal regions and estuaries of the Indo-Pacific, including parts of Southeast Asia. In the wild, they inhabit fast-flowing streams and tidal areas where freshwater meets the ocean. Because they originate in these dynamic environments, they are naturally adapted to varying water conditions but thrive best in clean, oxygen-rich waters with plenty of smooth rocks covered in biofilm.

Description of Red Venom Horned Snail

Staying relatively small, the Red Venom Horned Snail typically reaches a maximum size of about 0.6 inches (1.5 cm). The "Red Venom" color morph is particularly striking, featuring a dark black or deep brown base color overlaid with thick, vibrant red or fiery orange bands. Some individuals also display intricate yellow dots or dashes within these bands. True to their name, they possess sharp, horn-like protrusions extending from their shells, which serve as a natural defense mechanism against predators.

Keeping and Caring for Red Venom Horned Snail

These snails are incredibly easy to care for, provided they are kept in a mature tank. They are completely peaceful and will not bother other tank mates, nor will they consume healthy aquarium plants.

Tank size:

A minimum tank size of 5 gallons is recommended to ensure enough surface area for algae and biofilm growth to sustain them.

Water Parameters:

Temperature

They prefer warmer tropical waters, ideally between 72°F and 82°F (22°C - 28°C).

pH

A slightly alkaline pH of 7.0 to 8.5 is crucial. Acidic water can cause their beautiful shells to erode over time.

Hardness

They require hard water to maintain their shell integrity and grow their horns. Aim for a General Hardness (GH) of 5-15 dGH and a Carbonate Hardness (KH) of 4-10 dKH.

Ammonia, Nitrite, Nitrate

Like most invertebrates, they are highly sensitive to poor water quality. Ammonia and Nitrite must always be at 0 ppm, and Nitrates should be kept below 20 ppm.

Feeding the Red Venom Horned Snail

The Red Venom Horned Snail is a phenomenal algae eater, eagerly consuming diatoms, green spot algae, and soft film algae from the glass, hardscape, and plant leaves. They rarely accept commercial foods initially, so a mature tank with natural algae is vital. You can supplement their diet with high-quality spirulina powder, algae wafers, and blanched vegetables like zucchini or spinach to ensure they receive adequate nutrition.

Breeding Red Venom Horned Snail

One of the greatest benefits of keeping Clithon species is that they will not overpopulate your freshwater aquarium. While females will lay small, white, sesame seed-like eggs on hard surfaces, these eggs require brackish or marine water to hatch and develop. In a standard freshwater setup, the eggs will simply remain unhatched, meaning you can enjoy these snails without the fear of a population explosion.

Conclusion

The Red Venom Horned Snail is a visually stunning, highly efficient, and perfectly sized addition to any freshwater setup. Their unique spiked shells, fiery coloration, and inability to breed in freshwater make them one of the most desirable algae-eating invertebrates in the aquarium hobby.

Snail info

Temperature : 22 - 28 °C (72 - 82 °F)
pH: 7.0 - 8.5
Color Form: Black

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