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Pagoda snail

Brotia pagodula

The Pagoda Snail is a highly demanding, spiky gastropod native to Myanmar's fierce rapids. It strictly requires a torrential Hillstream setup with extremely high flow.

Taxonomy
Class:Gastropoda
Order:Sorbeoconcha
Family:Pachychilidae
Genus:Brotia
Species:Brotia pagodula

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Water Temperature

20 - 28 °C

pH Value

7 - 8.4

Water type

Freshwater

Invertebrate type

Freshwater snail

Adult size

4 cm

Minimum group

>= 1

GH

6 - 20 dGH

KH

3 - 15 dKH

TDS

120 - 450 ppm

Ecological role

Scavenger

Copper sensitivity

High

Species description

Geographical Origin and Habitat: The Pagoda Snail (*Brotia pagodula*) is a rare, spectacular, and highly demanding freshwater gastropod natively endemic to the pristine, fast-flowing rivers, fierce rapids, and oxygen-rich streams of Myanmar (Burma) and parts of Thailand. Their natural biotope is defined by extreme water velocity, rushing over smooth boulders and rocky riverbeds. They spend their entire lives clamped down against torrential currents, relying heavily on filtering microscopic particles and grazing on specialized riverine algae.
Taxonomy: Scientifically classified within the Pachychilidae family, they are large, breathtakingly unique snails. Fully mature adults reach 3.5 to 5.0 centimeters (1.4-2.0 inches) in shell length. Their common name is derived from their incredible, distinct shell: a highly elevated, spiraling cone that is aggressively heavily armed with thick, sharp, outward-pointing fleshy spikes (spines) arranged in perfect tiered whorls, flawlessly resembling an ancient Asian pagoda. They possess gills and a hard operculum.
Social Behavior: They are completely peaceful, heavily armored, and relatively slow-moving scavengers. Despite their fierce, spiky appearance, they possess absolutely zero predatory instincts and ignore all fish and shrimp. Because they are adapted to torrential river currents, their behavior in aquariums is often sluggish. They spend their time methodically traversing hardscapes (rocks and driftwood) rather than glass, using their rasping mouthparts to graze, while simultaneously utilizing internal structures to filter feed.
Coloration and Sexual Dimorphism: Sexual dimorphism is visually non-existent; while distinct males and females exist, they cannot be reliably sexed by the human eye. The incredibly intricate, spiky pagoda shell is highly textured and usually features a deeply saturated, earthy coloration: base colors of rich mahogany, reddish-brown, or deep olive-green, often with lighter golden banding along the whorls. Their muscular foot is surprisingly small for their shell size and is usually a dark, mottled grey or yellowish-brown.

Care, breeding and tankmates

Tank Setup: The aquarium architecture MUST strictly replicate a torrential river ecosystem (a Hillstream setup). A minimum 75-liter (20-gallon) tank is required. The tank MUST feature extremely powerful, unidirectional water flow (using powerheads or manifold systems) and massive surface agitation. The scape should consist entirely of smooth river boulders and heavy driftwood.
CRITICAL WARNING: They will absolutely suffer and slowly die in stagnant, slow-moving, or standard low-flow community aquariums.
Diet and Feeding: They are highly specialized omnivorous grazers and partial filter feeders, making them incredibly difficult to feed in captivity. They DO NOT eat healthy aquarium plants, nor do they effectively consume standard hair algae. They rely on thick, mature aufwuchs (biofilm and microscopic organisms) growing on highly oxygenated rocks. Their diet MUST be meticulously supplemented with premium spirulina powder (squirted into the current), specialized sinking omnivore wafers, and blanched vegetables (zucchini).
Water Quality: Originating from fierce river rapids, they possess an absolute, uncompromising biological requirement for pristine, incredibly oxygen-rich, and HARD water. They require moderate tropical heat (22-26°C / 72-79°F). They STRICTLY require hard, highly alkaline water (GH 8-20, pH 7.5 - 8.5) rich in dissolved calcium to maintain their massive, spiky shells. Keeping them in soft, acidic water will rapidly dissolve their spectacular shell spines. They have zero tolerance for Ammonia, Nitrites, or high Nitrates.
Compatibility and Tankmates: Compatibility is excellent due to their heavily armored, spiky shell, but their environmental requirements heavily restrict tankmates. They MUST be housed in specialized Hillstream setups. They are perfect companions for fast-water species like Hillstream Loaches (Sewellia, Gastromyzon), White Cloud Mountain Minnows, and fast-swimming Danios. They MUST NEVER be housed with aggressive, snail-eating predators, or slow-moving fish (like Bettas) that cannot survive the torrential water flow they require.
Aquarium Breeding: Breeding the Pagoda Snail in captivity is considered incredibly difficult and exceedingly rare, making them highly prized. They are livebearers (viviparous); females incubate the eggs internally and give birth to fully formed, tiny, spiky miniature snails. They reproduce incredibly slowly, giving birth to only a few young at a time. Because they require pristine riverine conditions to breed, and due to their microscopic brood size, they will absolutely NEVER overpopulate or become a "pest" in an aquarium.
Risks and Diseases: The absolute greatest physical risk is slow, agonizing starvation and asphyxiation caused by placing them in standard, slow-moving, poorly oxygenated community tanks; powerful Hillstream flow is unconditionally mandatory. The second major risk is lethal starvation; they require mature aufwuchs and powdered spirulina, as they often refuse standard pellets. Finally, their spectacular spikes will completely dissolve and erode if kept in soft, acidic water lacking calcium.

Geographic Origin and Distribution

The Pagoda Snail (*Brotia pagodula*) is a rare, spectacular, and highly demanding freshwater gastropod natively endemic to the pristine, fast-flowing rivers, fierce rapids, and oxygen-rich streams of Myanmar (Burma) and parts of Thailand. Their natural biotope is defined by extreme water velocity, rushing over smooth boulders and rocky riverbeds. They spend their entire lives clamped down against torrential currents, relying heavily on filtering microscopic particles and grazing on specialized riverine algae.

Origin

Tropical oceans and reefsNorth AmericaSouth and Southeast Asia

Invertebrate profile

Diet
Biofilm grazer
The diet of Brotia pagodula typically reflects its natural foraging behavior as a freshwater snail. It thrives on a varied diet that can include specialized commercial foods, naturally occurring biofilm, and appropriately sized organic matter. Providing a balanced nutritional profile ensures robust health, strong coloration, and proper energy levels. Supplemental feeding should be adjusted based on the maturity of the tank and the presence of natural food sources.
Ecological role
Scavenger
In its native habitat and the home aquarium, Brotia pagodula plays a vital ecological role. It contributes significantly to the processing of organic waste and the maintenance of a balanced micro-ecosystem. By engaging in natural behaviors like scavenging, grazing, or sifting, it helps prevent the accumulation of detritus. This species is often considered a crucial component of a comprehensive clean-up crew.
Shock sensitivity
High
Sudden shifts in water parameters can trigger severe osmotic shock in Brotia pagodula. It requires slow, careful acclimation, preferably using the drip method over several hours. Rapid changes in temperature, salinity, or pH can lead to immediate stress, failed molts, or mortality. Maintaining absolute stability in the tank is more important than chasing specific target values.
Calcium and minerals
High
Adequate calcium levels are absolutely essential for the structural integrity and growth of Brotia pagodula. For crustaceans and snails, it facilitates proper shell and exoskeleton development, while for corals, it builds the skeletal structure. Aquarists must regularly monitor calcium concentration alongside alkalinity and magnesium. Supplementation through specialized products or mineral-rich foods may be necessary in depleted systems.
Molting
Shell growth
If applicable to this species, the molting process is a highly vulnerable period for Brotia pagodula. During this time, the animal will hide while its new exoskeleton hardens, requiring peace and stable water chemistry. The discarded molt should generally be left in the tank, as it provides a valuable source of recycled minerals. A lack of iodine or calcium can lead to fatal molting issues, often referred to as the 'white ring of death'.
Reproduction
Variable
The reproductive strategy of Brotia pagodula can range from simple cloning and fragmentation to complex larval stages requiring varying water conditions. Successful captive breeding often signifies excellent water quality and a well-balanced environment. While some species will readily multiply and populate the tank, others may require specialized rearing setups for the offspring to survive. Researching their specific larval development phase is critical for aquarists aiming to breed them.
Compatibility & tankmates
Peaceful
When selecting tank mates for Brotia pagodula, cautious planning is imperative to avoid predation or aggressive competition. Small or peaceful invertebrates should not be housed with aggressive fish, loaches, or large crabs that might view them as food. Conversely, some specialized invertebrates form symbiotic relationships that can be highlighted in a community setup. A heavily planted or intricately rock-scaped tank often provides necessary refuges.

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Last updated: 06/30/2026