Elegant cory
Gastrodermus elegans
An anomalous Corydoras: unlike most congeners that stick to the bottom, it frequently swims in the midwater column, making it more visible and active in the overall aquarium. The compact body with dark reticulated pattern and golden hues makes it aesthetically unique. Native to the Amazon basin, it tolerates a wider hardness range than many Corydoras. Breeding has a peculiarity: the classic T-position is not typical of this species. Breathes atmospheric air like all Corydoras.
Temperatura da água
22 - 26 °C
Valor de pH
6 - 7.5
Tipo de água
Água doce
Nível do tanque
Parte inferior e intermediária
Tamanho adulto
5 cm
Volume mínimo do tanque
>= 75 L
Grupo mínimo
>= 6
GH
2 - 15 dGH
KH
1 - 7 dKH
TDS
40 - 295 ppm
Condutividade
63 - 461 uS/cm
Descrição da espécie
Geographical Origin and Habitat: Amazon River basin (Peru, Brazil, Colombia). Very adaptable, inhabits both clear streams and blackwater rivers rich in roots, leaves and rotting fruit.
Taxonomy and Morphology: Elegant Corydoras (Gastrodermus elegans). Belongs to the "elegans group", characterized by a much more pelagic (mid-water) swimming compared to other Corydoras.
Social Behavior: Unlike its cousins who spend 100% of their time on the sand, C. elegans frequently swims in mid-water, often hovering in a school among the leaves of aquatic plants.
Coloration and Sexual Dimorphism: The male has a very elaborate and "elegant" pattern of parallel black longitudinal stripes (or reticulated) on a grayish-olive background. The female is much drabber, robust and lacks the clear striped pattern.
Cuidado, criação e companheiros de tanque
Aquarium Setup: Sand bottom is always necessary, but the aquarium should be well planted (with broad-leaved plants) to offer mid-water hovering points. Light not too blinding.
Diet and Feeding: Does not sift the bottom as deeply as long-snouted species. Feeds readily in the water column. Sinking feeds, daphnia and brine shrimp (live or freeze-dried).
Water Quality: Robust and easy to keep. Basic requirements: excellent oxygenation, good filtration and regular bottom cleaning.
Compatibility and Cohabitation: Ideal for South American community tanks, with peaceful medium or small sized Characins and dwarf Cichlids (Apistogramma). Totally harmless towards others.
Aquarium Breeding: The female lays a great many eggs (hundreds if adult) on the aquarium glass or in areas of greater current after the inevitable stimulation with cold water changes.
Risks and Diseases: It is a very rustic corydoras. The greatest danger remains copper poisoning or the ingestion of sharp gravel in search of food.
Origem e distribuição geográfica
Amazon River basin (Peru, Brazil, Colombia). Very adaptable, inhabits both clear streams and blackwater rivers rich in roots, leaves and rotting fruit.
Origem
Amazônia, Orinoco e Guianas
Perfil de peixe
- Temperamento
- Peaceful
- The temperament of Gastrodermus elegans can only be described as completely peaceful and highly gregarious. They are a schooling fish by nature and absolutely must be kept in groups of at least six individuals of their own kind to feel secure. When kept in insufficient numbers, they will become extremely stressed, reclusive, and susceptible to disease. In a proper school, they are active, inquisitive, and highly entertaining to watch as they scurry around the bottom together like a busy little cleaning crew. They pose absolutely no threat to any other inhabitants in the aquarium.
- Dieta
- Omnivore
- In the wild, Gastrodermus elegans is a micro-predator and scavenger that sifts through the substrate for small insects, worms, and crustaceans. In the aquarium, they readily accept a wide variety of high-quality sinking foods, including pellets, wafers, and granules designed for bottom feeders. To ensure optimal health and coloration, their diet should be supplemented with live or frozen foods such as bloodworms, daphnia, and brine shrimp. They are not true algae eaters, so feeding them solely algae wafers is a common mistake that can lead to malnutrition. A varied diet will keep their immune system strong and encourage natural foraging behaviors.
- Expectativa de vida
- 5-10 years
- Tamanho adulto
- 5 cm
- Proporção sexual
- School
- When keeping Gastrodermus elegans, the exact sex ratio is not strictly critical for their day-to-day well-being, as they do not exhibit aggression toward each other. However, if the goal is to breed them, a ratio of two or three males for every female is strongly recommended. This multiple-male approach increases the chances of successful fertilization during the spawning process. Females are typically larger and noticeably broader when viewed from above, especially when conditioned with high-quality foods. Maintaining a healthy, mixed-gender school allows for the observation of their fascinating natural social dynamics.
- Frequência de alimentação
- Twice daily
- It is generally recommended to feed Gastrodermus elegans small amounts of food once or twice a day. The key is to provide only what the fish can completely consume within a few minutes to prevent uneaten food from rotting in the substrate. Because they are bottom feeders, you must ensure that enough food reaches the bottom before faster mid-water fish consume it all. If feeding twice a day, offering a staple sinking pellet in the morning and a frozen treat in the evening works exceptionally well. Observing their bellies can help you gauge if they are getting enough food; they should look gently rounded but not bloated.
- Carga biológica
- Low
- The bioload of Gastrodermus elegans is relatively low to moderate, making them an excellent choice for a community aquarium. They do not produce excessive amounts of waste compared to larger or more predatory fish. However, because they are a schooling species and should be kept in groups, the cumulative bioload of the school must be accounted for when sizing the filtration system. Regular water changes and a properly cycled aquarium are still essential to maintain the high water quality they require. It is important to avoid overfeeding, as uneaten food will negatively impact the water parameters.
- Fluxo
- Strong
- Gastrodermus elegans appreciates a moderate amount of water flow in the aquarium, simulating the gentle currents of their native South American streams. The flow should be strong enough to keep the water well-oxygenated and prevent detritus from settling on the bottom, but not so strong that the fish struggle to swim or rest. Using a standard hang-on-back or canister filter usually provides the perfect amount of water movement. They will often be seen actively swimming against the current for exercise, but they also need quiet resting areas among plants or hardscape. Providing a balance of moving water and still zones is the best approach to their habitat.
- Risco de salto
- No
- Reprodução
- Oviparous
- Breeding Gastrodermus elegans in captivity is entirely possible and often highly rewarding for dedicated aquarists. They are egg scatterers, typically laying their adhesive eggs on broad-leaved plants, aquarium glass, or smooth stones after an elaborate courtship dance. To trigger spawning, aquarists often perform a large, cool water change to simulate the onset of the rainy season in the Amazon basin. Once the eggs are laid, the parents provide no parental care and may even consume their own eggs if not removed. For the best survival rate, the eggs should be transferred to a separate rearing tank and the fry fed infusoria or freshly hatched brine shrimp.
- Compatibilidade e companheiros de tanque
- Community
- Gastrodermus elegans is incredibly peaceful and makes a fantastic addition to most community tanks. They get along well with other peaceful, similarly sized fish such as tetras, rasboras, and dwarf cichlids. It is crucial to avoid keeping them with large, aggressive, or predatory species that might view them as food or nip at their fins. They are also completely safe to keep with most ornamental snails and adult dwarf shrimp, although baby shrimp might occasionally be eaten. Their bottom-dwelling nature means they rarely compete for space with mid- or top-dwelling tank mates.
- Nível do tanque
- Middle/Bottom
- As classic bottom-dwellers, Gastrodermus elegans will spend nearly all of their time foraging and resting on the substrate. They use their sensitive barbels to meticulously search the sand or fine gravel for any edible morsels that have sunk to the bottom. While they are primarily benthic, it is completely normal to see them periodically make lightning-fast dashes to the water's surface to take a gulp of air. Aside from these quick trips to the top, they will almost never be found swimming in the middle or upper levels of the water column. Providing a large footprint with plenty of open bottom space is far more important than tank height.
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 = 0.01778, b = 3.02
- VulnerabilidadeVulnerabilidade baixa (10 / 100)
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