Guapore Cory
Gastrodermus guapore
An elegant mid-water swimmer showcasing a pinkish-silver body punctuated by a distinct black spot on its caudal peduncle. It needs wide swimming spaces and tall resting plants.
Temperatura da água
22 - 26 °C
Valor de pH
6 - 7.2
Tipo de água
Água doce
Nível do tanque
Parte inferior
Tamanho adulto
5,5 cm
Volume mínimo do tanque
>= 100 L
Grupo mínimo
>= 6
GH
2 - 12 dGH
KH
2 - 10 dKH
TDS
50 - 280 ppm
Condutividade
78 - 438 uS/cm
Descrição da espécie
Geographical Origin and Habitat: Endemic to the Rio Guaporé basin (which marks the border between Brazil and Bolivia). Inhabits the white and clear waters of rivers, but also oxbows, forest swamps, and flooded zones characterized by very fine sand and dense submerged vegetation.
Taxonomy and Morphology: Medium-sized (5.5 cm / 2.2 inches). Presents a peculiar and fascinating phenotype: a distinct "black patch" positioned very far back on the caudal peduncle, which in swimming imitates the eye of a much larger fish, eluding predators. Round snout shape.
Social Behavior: Among all Corydoras, the guapore is known for its "mid-water" swimming style. It spends a lot of time raised from the bottom "hovering" or swimming freely in the water column. Extremely gregarious, it demands large groups (10+).
Coloration and Sexual Dimorphism: "Dalmatian" livery: light body finely spotted with dark over almost the entire surface. A colossal round black spot adorns the tail (eye-spot). Dimorphism not obvious except in shape: females seen from above are almost spherical in the ventral area.
Cuidado, criação e companheiros de tanque
Aquarium Setup: Being a mid-water swimmer, it needs wide open spaces for free swimming. The bottom must strictly be sandy (silica). Important to set up shelters with tall aquatic plants (Vallisneria, Echinodorus) where they can rest.
Diet and Feeding: In nature, it collects suspended zooplankton and benthos. In the aquarium, it eagerly accepts live brine shrimp nauplii, daphnia, and cyclops, as well as sinking granules and chips with a protein base (krill, fish). Never rely only on food scraps.
Water Quality: Recommended temperatures between 22 and 26°C (72-79°F). Hardness GH 2-12 and pH between weakly acidic and neutral (6.0 - 7.2). Mandatory maintenance with generous weekly water changes to reduce nitrates, otherwise rapid fin clamping and wasting.
Compatibility and Cohabitation: The ideal tankmate for delicate Amazonian communities. Pairs wonderfully with Nannostomus, Carnegiella, and small Tetras. Its habit of swimming raised from the bottom makes it vulnerable to territorial dwarf Cichlids during breeding.
Aquarium Breeding: Obtained by stimulating them with large cold thermal shocks. Reproduction in T-position culminates with the release of large clear eggs on smooth supports and leaves in the current. Breeders will systematically devour the clutches if not removed.
Risks and Diseases: The lack of a large conspecific group causes stress and immune collapse. Highly sensitive to pollution and barbel atrophy on sharp gravels. Fatal toxicity to Copper and many aggressive commercial curatives.
Origem e distribuição geográfica
Endemic to the Rio Guaporé basin (which marks the border between Brazil and Bolivia). Inhabits the white and clear waters of rivers, but also oxbows, forest swamps, and flooded zones characterized by very fine sand and dense submerged vegetation.
Origem
Extra-Amazônica América do SulLeste Asiático
Perfil de peixe
- Temperamento
- Semi-aggressive
- The temperament of Gastrodermus guapore is incredibly peaceful, sociable, and somewhat shy when kept individually. They are an obligate schooling fish that absolutely requires the company of their own kind to feel secure and behave naturally. When kept in groups of at least six, they become active and highly entertaining as they constantly interact with one another. If kept alone or in inadequate numbers, they will likely become stressed, reclusive, and more susceptible to disease. They show zero aggression towards other tank inhabitants and are a model citizen for any peaceful community aquarium.
- Dieta
- Omnivore
- In the wild, Gastrodermus guapore is a micro-predator and scavenger, feeding on tiny worms, crustaceans, and plant matter. In the home aquarium, they readily accept a wide variety of sinking foods such as high-quality pellets, wafers, and granules. It is essential to supplement their diet with live or frozen foods like bloodworms, Daphnia, and brine shrimp to ensure optimal health and coloration. Because they are bottom feeders, you must ensure that enough food reaches the substrate before being consumed by mid-water fish. A varied diet prevents nutritional deficiencies and promotes a robust immune system.
- Expectativa de vida
- 3-5 years
- Tamanho adulto
- 5.5 cm
- Proporção sexual
- Group
- For Gastrodermus guapore, maintaining a specific strict sex ratio is not strictly necessary for general community keeping, as they do not exhibit aggressive territorial behavior towards each other. However, if breeding is the primary goal, a ratio of two or three males for every single female is strongly recommended. This higher male-to-female ratio encourages competitive courtship and generally results in a higher fertilization rate for the eggs. In a standard display tank, simply ensuring they are in a suitably sized group of six or more individuals is more important than the exact gender makeup. Females are typically noticeably rounder and broader when viewed from above, especially when full of eggs.
- Frequência de alimentação
- Twice daily
- It is highly recommended to feed Gastrodermus guapore small portions one to two times a day. They have relatively small stomachs, so multiple small meals are much better than a single large one. Observe their feeding behavior carefully; all offered food should be consumed within roughly two to three minutes. If there is uneaten food left on the substrate, reduce the portion size during the next feeding. Foraging is a natural behavior, so spreading the food slightly can encourage natural scavenging activity.
- Carga biológica
- Low
- The bioload of Gastrodermus guapore is generally considered to be quite low compared to larger freshwater fish. They are small, efficient scavengers that do not produce excessive amounts of waste in the aquarium. However, because they must be kept in groups of at least six, the cumulative bioload should be factored into your filtration capacity. Regular water changes and good mechanical filtration are still necessary to maintain optimal water quality. Overfeeding can quickly spike ammonia, so moderation is key.
- Fluxo
- Stagnant
- As a species that often inhabits slow-moving to moderately flowing streams in South America, Gastrodermus guapore appreciates gentle to moderate water circulation. They do not fare well in highly turbulent environments where they must constantly struggle against strong currents. Providing areas of calmer water, especially near the bottom where they spend most of their time, is important for their rest. The filter return should provide adequate oxygenation without turning the tank into a whirlpool. Natural river stones and driftwood can be used to break the flow and create comfortable resting zones.
- Risco de salto
- Yes
- The jump risk for Gastrodermus guapore is generally considered to be quite low under normal, stress-free aquarium conditions. They are primarily bottom-dwelling fish that focus their activities on foraging in the substrate. However, like many Corydoras, they will occasionally dart to the surface to gulp atmospheric air, a completely normal behavior linked to their specialized intestinal respiratory system. If water parameters deteriorate or if they are severely startled, they might accidentally launch themselves out of an open tank. Therefore, a well-fitting lid is still highly recommended to prevent any unfortunate accidents.
- Reprodução
- Oviparous
- Breeding Gastrodermus guapore in captivity is entirely possible but requires some dedicated preparation and conditioning. They are egg scatterers, typically laying their adhesive eggs on broad plant leaves, aquarium glass, or smooth stones after a lively courtship display. To trigger spawning, aquarists often perform a large, slightly cooler water change to simulate the onset of the rainy season in their natural habitat. Once eggs are laid, the parents may eat them, so it is often necessary to remove the eggs or the adult fish to a separate rearing tank. The fry are quite small and require infusoria or finely powdered foods before graduating to freshly hatched brine shrimp.
- Compatibilidade e companheiros de tanque
- Peaceful
- Gastrodermus guapore is an extremely peaceful community fish that thrives in the company of other calm species. They should never be housed with large, aggressive, or highly active bottom-dwellers that might outcompete them for food or nip at their fins. Ideal tank mates include small tetras, rasboras, peaceful dwarf cichlids, and other similarly sized peaceful fish. Keeping them with small freshwater shrimp is usually safe, though tiny shrimplets might occasionally be eaten. Their peaceful nature makes them an excellent addition to almost any tranquil community setup.
- Nível do tanque
- Bottom
- Like the vast majority of its relatives, Gastrodermus guapore is a dedicated bottom-dwelling fish that spends most of its time resting or foraging on the substrate. They use their sensitive barbels to constantly sift through sand or fine gravel in search of edible morsels. Providing a soft, sandy substrate is crucial to prevent their delicate barbels from wearing down or becoming infected. While they do occasionally dart to the water surface to gulp air, they will immediately return to the lower levels of the tank. Ensure there is plenty of open swimming space along the bottom alongside shaded resting areas under plants or driftwood.
Modelos e parâmetros científicos
FishBase
Acesso aos dados científicos oficiais da espécie
FishBase v25.04Dados sincronizados em: 15/06/2026
- Nível trófico
- 3 ± 0,3 se
- Resiliência
- Alta (menos de 15 meses)
- Unicidade filogenética (PD50)
- 0.5001
- Relação bayesiana comprimento-peso
- a = 0.00741, b = 3.14
- VulnerabilidadeVulnerabilidade baixa (10 / 100)
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