Hedgehog Snail (Brotia armata)

09 October 2026

240

The hedgehog snail, Brotia armata, is a large freshwater pachychilid recognized by its strongly ridged, spiny shell. It is a grazing and scavenging snail rather than a dedicated algae-control species, and it needs mature aquariums with clean, oxygenated water and adequate mineral content. Identification from photographs can be uncertain because several Brotia species have similar shell forms, so locality information is useful when confirming specimens.

Taxonomy and identification

Brotia armata is a freshwater gastropod in the family Pachychilidae. Its shell is typically elongated and heavily sculptured, with pronounced ridges or spines and brown to amber coloration. The common name is not completely standardized in aquarium trade, and similarly shaped Brotia species may be sold under overlapping names. Confirming a specimen to species level from a photograph alone is therefore not always possible.

Natural habitat

Brotia species are associated with flowing freshwater habitats in tropical Southeast Asia, including streams and rivers with firm substrates, stones and substantial oxygenation. The exact native range and habitat preferences of aquarium-trade B. armata should be checked against collection locality, since trade identification is sometimes uncertain. Provide stable flow, shaded resting areas and smooth stones or other surfaces for grazing.

Aquarium water and setup

Use a mature aquarium with efficient biological filtration, good circulation and no detectable ammonia or nitrite. Neutral to alkaline, moderately hard or hard water helps maintain the shell and supports normal activity. Supply calcium and other minerals through suitably mineralized water, a calcium-rich food or an aquarium-safe supplement, while avoiding sudden changes in temperature, pH or hardness. A secure lid is advisable because large snails may climb above the waterline.

Feeding

This snail grazes on biofilm, algae and other organic material, but a clean aquarium may not produce enough natural food. Offer sinking foods such as algae wafers, spirulina-based foods and quality invertebrate pellets, together with occasional blanched vegetables. Remove uneaten food before it decomposes. A varied diet and adequate calcium are more reliable than expecting the snail to live only on algae.

Plant safety

Brotia armata is generally considered plant-safe and normally grazes surfaces rather than healthy plant tissue. It may nevertheless climb over delicate plants, disturb newly planted stems or dislodge poorly rooted specimens because of its size and weight. Anchor plants securely and provide hardscape or other surfaces where the snail can feed without repeatedly crossing fragile foliage.

Reproduction

Brotia are live-bearing snails rather than prolific egg-clutch layers. Young are retained by the female and released as developed juveniles, so reproduction is usually much slower and less conspicuous than that of common pond, bladder or ramshorn snails. Successful breeding requires compatible adults, stable water, good food and sufficient minerals. Exact reproductive details can vary among Brotia species and populations.

Population control

Population growth is usually limited by the species’ comparatively slow reproduction, but excess numbers can still result from overfeeding. Feed measured portions, remove leftovers and monitor the aquarium after maintenance. Manually relocate unwanted adults or juveniles, and rehome surplus animals where possible. Do not use copper-based snail treatments in a tank containing valued snails, and never release aquarium animals into natural waterways.

Snail info

Temperature : 22–28 °C
pH: 7.0–8.5

Related on Snails

Leave your comments

Latest on Snails

Piano Snail (Taia naticoides)

The piano snail, also sold as the brush algae snail, is a large freshwater operculate snail with a rounded, banded shell. Taia naticoides is associated with Southeast Asian freshwater habitats and is valued for grazing surface growth and consuming organic debris. Aquarium identification can be complicated because common names are applied inconsistently; confirm the species with a reliable supplier. It is generally peaceful, plant-safe and live-bearing, but it needs mineral-rich water and should not be treated as a solution for heavy algae growth.
Orange Track Racing Snail (Vittina semiconica)

The Orange Track racing snail, Vittina semiconica, is a freshwater nerite valued for algae grazing and its patterned orange shell. It is generally peaceful, plant-safe and suitable for established community aquariums. Identification from shell pattern alone can be difficult because several Vittina and related nerite species resemble one another, so the supplied trade name should be treated as provisional unless confirmed by a specialist examination.
Orange Rock Snail (Orange Tylomelania)

The Orange Rock Snail is a trade name commonly used for orange-bodied Tylomelania, a group of freshwater snails associated with Sulawesi. Its dark, strongly ridged shell contrasts with the bright orange foot and head. Exact species identification is uncertain from the trade name and photographs alone, so care should follow general Tylomelania requirements. These snails are peaceful, active mainly at night, and best kept in mature, warm, alkaline aquariums with stable mineral content.
Orange Red Ramshorn Snail (Planorbella duryi duryi)

The orange red ramshorn snail is a freshwater planorbid recognized by its flat, coiled shell and brightly colored body. Planorbella duryi duryi is associated with freshwater habitats in the southeastern United States, especially Florida, although aquarium specimens may be selectively bred and their exact locality is often unknown. It is generally peaceful, useful as a grazer and scavenger, and capable of reproducing quickly when food is abundant.
Midnight Lady Snail (Vittina sp.)

The Midnight Lady Snail is a dark, patterned nerite sold under the aquarium trade name Midnight Lady Schnecke. It is identified here as Vittina sp., because the exact species cannot be confirmed from the supplied name and photograph alone. These snails are generally peaceful algae grazers for mature freshwater aquariums, but successful breeding requires conditions that are not normally present in freshwater tanks.
Ivory Predatory Snail: Anentome helena

The ivory predatory snail, commonly sold as Clea helena, is a freshwater assassin snail from Southeast Asia. It has a strongly ribbed, ivory to yellow-brown shell and a mottled gray-brown body. This active carnivore hunts or scavenges other small snails and accepts meaty foods in aquaria. It is generally plant-safe, but its predatory diet and egg-laying reproduction require planning when keeping it with ornamental snails or maintaining a controlled population.
Indian Malayan Louver Snail (Melanoides tuberculata)

Melanoides tuberculata is a small, conical freshwater snail commonly known in aquaria as the Malaysian trumpet snail. It spends much of the day burrowing through substrate and becomes more active after dark. This adaptable species consumes biofilm, algae, detritus and uneaten food, while generally leaving healthy plants alone. Its live-bearing reproduction can produce a large population when food is abundant. The name supplied for this article is retained, although common names vary and aquarium specimens may be confused with related thiarid snails.
Green staghorn snail (Clithon corona)

The green staghorn snail, Clithon corona, is a nerite snail valued for grazing algae and biofilm in freshwater aquariums. It is generally peaceful, plant-safe and unlikely to overpopulate in freshwater because its larvae normally require brackish or marine conditions. Provide mature surfaces for grazing, mineral-rich water and a secure lid. Identification can be difficult because aquarium trade names overlap among Clithon species, so the supplied name should be treated as a probable identification rather than a definitive one.
Geweihschnecke Tricolor (Clithon sp.)

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.
Geweihschnecke Red Venom (Clithon sowerbianum)

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 Volcano Red (Clithon sowerbianum)

The Volcano Red Geweihschnecke is a small freshwater nerite-type snail sold under the scientific name Clithon sowerbianum. Its shell commonly shows red, orange, brown, and dark patterns, with horn-like projections in some individuals. It grazes algae and biofilm from hard surfaces without normally damaging healthy plants. Identification and the exact validity or spelling of the supplied scientific name should be treated with some caution because aquarium trade names and Clithon nomenclature are not always used consistently.
Yellow Baby Poso Snail, Tylomelania sp.

The Yellow Baby Poso Snail is a juvenile Tylomelania identified in the trade as Tylomelania sp. Its yellow to golden body contrasts with a dark, strongly ribbed shell. The “Poso” name suggests a Sulawesi lake lineage, but the exact species and locality cannot be confirmed from the supplied trade name or photographs alone. This is a freshwater snail for warm, mineral-rich aquariums and should be kept with peaceful tank mates that will not damage its soft body or feelers.
Gelbe Rennschnecke (Vittina waigiensis)

Vittina waigiensis is a nerite snail kept for grazing algae and biofilm on aquarium glass, rocks and hardscape. Its rounded shell may show yellow, orange or reddish tones with dark markings, but commercial names are not always applied consistently. Identification from photographs alone can be uncertain, so shell pattern should be checked against a reliable taxonomic reference. Adults are generally peaceful and do not normally damage healthy aquarium plants.
Devil's Thorn Snail (Faunus ater)

Faunus ater is a large, elongated pachychilid snail from tropical Indo-West Pacific waters. It is associated with freshwater streams, rivers and estuarine habitats, and aquarium specimens are often kept in freshwater or mildly brackish conditions. Its dark, banded or reddish-brown shell is distinctive, although identification from photographs alone can be uncertain. It is generally peaceful, plant-safe and slow to reproduce in typical freshwater aquaria.
Deadpool Rennschnecke (Vittina waigiensis)

Vittina waigiensis is a nerite snail sold in the aquarium trade under names such as Deadpool Rennschnecke, usually referring to a striking red shell with dark patterning. It is a peaceful algae grazer that generally leaves healthy plants alone. Adults can live in freshwater aquariums, but successful reproduction requires brackish or marine conditions during the larval stage. The trade name and shell pattern are not sufficient for absolute identification, so the species assignment should be treated as provisional unless confirmed by specialist examination.
Cappuccino Snail (Faunus ater)

Faunus ater is a large pachychilid snail associated with tropical rivers, streams and estuarine environments across parts of the Indo-Pacific. Its dark, elongated shell commonly has reddish-brown, orange or pale bands toward the tip. In aquaria it is generally a peaceful grazer that feeds on algae, biofilm and sinking foods. Successful reproduction is unusual in ordinary freshwater tanks because its life cycle includes free-floating larvae requiring suitable water conditions.