Brotia armata (Hedgehog Snail)

20 April 2026

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Meet the Hedgehog Snail (Brotia armata), a unique and striking freshwater invertebrate known for its heavily spiked, towering shell. Native to fast-flowing Asian rivers, this fascinating scavenger adds incredible texture and a prehistoric aesthetic to your aquarium while remaining completely peaceful and an excellent algae eater.

Overview

The Hedgehog Snail, scientifically known as Brotia armata, is a remarkable freshwater snail highly sought after for its distinctive, spike-covered shell. It is a peaceful, slow-moving invertebrate that spends most of its time grazing on algae and biofilm, making it both a functional and highly ornamental addition to the freshwater aquarium.

Distribution and Habitat

Native to Southeast Asia, particularly Thailand, the Hedgehog Snail is typically found in fast-flowing rivers and streams with highly oxygenated water. They prefer environments with sandy or rocky substrates where they can safely graze on natural biofilm, aufwuchs, and detritus that accumulates among the riverbed stones.

Description of Hedgehog Snail

As its common name suggests, the Hedgehog Snail features a thick, elongated, and heavily textured shell adorned with prominent, outward-facing spikes or tubercles. The shell coloration generally ranges from dark brown to olive or blackish hues. The snail's body is typically a mottled gray or dark brown. They are relatively large snails, often reaching up to 2 to 2.5 inches in length.

Keeping and Caring for Hedgehog Snail

Caring for Brotia armata requires replicating their natural riverine habitat. They thrive in clean, highly oxygenated water with moderate to high flow.

Tank size:

A minimum tank size of 20 gallons is recommended to provide ample grazing surface area and stable water conditions.

Water Parameters:

Temperature

Keep the water temperature between 72°F and 82°F (22°C - 28°C).

pH

A slightly alkaline pH of 7.0 to 8.2 is ideal to prevent shell erosion.

Hardness

Moderate to hard water (8 - 15 dGH) is crucial for maintaining their thick, spiked shells.

Ammonia, Nitrite, Nitrate

Ammonia and Nitrite must always be 0 ppm. Nitrates should be kept as low as possible, ideally below 20 ppm. They are highly sensitive to poor water quality.

Feeding the Hedgehog Snail

While they are excellent scavengers of algae and biofilm, their diet in the aquarium must be supplemented. Offer them high-quality sinking pellets, algae wafers, blanched vegetables (like zucchini, spinach, and cucumber), and powdered invertebrate foods. Since they are adapted to grazing on aufwuchs, providing rocks with natural algae growth is highly beneficial.

Breeding Hedgehog Snail

Breeding the Hedgehog Snail in captivity is extremely rare and difficult. They are gonochoristic (having distinct male and female genders) and are viviparous, meaning they give birth to live young rather than laying eggs. However, the specific triggers for reproduction in a home aquarium remain largely unknown, making them a non-invasive species that won't overpopulate your tank.

Conclusion

The Hedgehog Snail is a magnificent, prehistoric-looking species that adds both utility and unique beauty to a freshwater setup. Provided you can meet their need for clean, highly oxygenated water and a steady food supply, Brotia armata will make a peaceful and captivating resident for your aquarium.

Snail info

Temperature : 72°F - 82°F (22°C - 28°C)
pH: 7.0 - 8.2
Color Form: Brown

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