Faunus ater (Cappuccino Snail)

03 April 2026

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The Cappuccino Snail (Faunus ater morph) is a striking, peaceful addition to the freshwater aquarium. Known for its elongated, conical shell featuring a beautiful gradient from deep espresso black to warm amber and white, this excellent scavenger tirelessly cleans the substrate while adding a touch of elegance to your tank.

Overview

The Cappuccino Snail, a popular color morph of Faunus ater (often labeled as Faunus sp.), is a highly sought-after invertebrate in the aquarium hobby. Renowned for its completely unique shell coloration that resembles a freshly brewed cappuccino, this snail is both a functional detritivore and a beautiful centerpiece. They are completely peaceful and safe to keep with dwarf shrimp, peaceful fish, and other non-aggressive tank mates.

Distribution and Habitat

In the wild, Faunus ater is widely distributed across Southeast Asia, including regions of Thailand, Malaysia, Indonesia, and the Philippines. They are typically found in coastal estuaries, river mouths, and brackish mangrove swamps where freshwater meets the ocean. Despite their natural inclination towards brackish environments, they are highly adaptable and thrive exceptionally well in pure freshwater aquariums.

Description of Cappuccino Snail

As clearly seen in the provided images, the Cappuccino Snail boasts a thick, elongated, and conical shell. The distinct color gradient is its defining feature: the widest part of the shell near the aperture is a deep, glossy black or dark chocolate brown. This color slowly fades into a vibrant reddish-brown, transitioning into a warm amber or orange, and finally culminating in a stark white or pale cream tip at the apex. The snail's foot and body are heavily pigmented, typically dark grey or black with subtle lighter speckling.

Keeping and Caring for Cappuccino Snail

Caring for the Cappuccino Snail is relatively straightforward, making it suitable for both beginner and experienced aquarists. Because of their thick shells, they require environments rich in calcium to prevent shell erosion. They spend the majority of their time plowing through the substrate, making them excellent sand-sifters that help aerate the tank bottom.

Tank size:

A minimum tank size of 10 gallons is recommended. These snails can grow quite large, reaching up to 3 inches (7.5 cm) in length, and need ample surface area to forage for food.

Water Parameters:

Stability is key. Because they originate from environments that can lean towards brackish, they prefer harder, alkaline water. Soft, acidic water will quickly degrade their beautiful shells.

Temperature

They prefer tropical temperatures ranging between 72°F and 82°F (22°C - 28°C).

pH

Keep the pH strictly neutral to alkaline, ideally between 7.0 and 8.2.

Hardness

Moderate to hard water is required. Aim for a GH of 8 to 15+ dGH to ensure they have enough minerals for shell maintenance.

Ammonia, Nitrite, Nitrate

Ammonia and Nitrite must always be at 0 ppm. Nitrates should be kept as low as possible, ideally below 20 ppm, through regular water changes.

Feeding the Cappuccino Snail

Cappuccino Snails are omnivorous scavengers with a hearty appetite. They will continuously graze on soft algae, biofilm, and decaying plant matter in the aquarium. However, a mature tank may not provide enough natural food for these large snails. Their diet should be supplemented with sinking algae wafers, bottom feeder pellets, and blanched vegetables such as zucchini, spinach, or cucumber. Adding dried leaf litter, like Indian Almond leaves, provides an excellent grazing surface and natural food source.

Breeding Cappuccino Snail

One of the major benefits of keeping the Cappuccino Snail in a freshwater aquarium is that they will not overpopulate your tank. Like many nerite snails, Faunus ater requires brackish or marine water to successfully reproduce. While they may occasionally lay eggs or release larvae in a pure freshwater environment, the offspring cannot survive without the specific salinity levels of an estuary, meaning your population will remain strictly controlled.

Conclusion

The Cappuccino Snail is a truly magnificent invertebrate that combines utility with unparalleled aesthetic appeal. Their striking black-to-white shell gradient makes them a standout addition to any hard-water aquarium. With proper care, adequate calcium, and a peaceful community, these gentle giants will thrive and keep your substrate clean for years to come.

Snail info

Temperature : 72°F - 82°F (22°C - 28°C)
pH: 7.0 - 8.2
Color Form: Black, Orange, White

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