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Desana Corydoras

Corydoras desana

An endemic Rio Negro armored catfish featuring a distinct dark stripe. Known to mimic C. tukano, it requires a soft blackwater biotope with fine sand and should be kept in active, peaceful shoals.

Taxonomy
Class:Actinopteri
Order:Siluriformes
Family:Callichthyidae
Subfamily:Corydoradinae
Genus:Corydoras
Species:Corydoras desana

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Water Temperature

22 - 27 °C

pH Value

6.2 - 7.4

Water type

Freshwater

Tank level

Bottom

Adult size

5.5 cm

Minimum tank volume

>= 80 L

Minimum group

>= 6

GH

3 - 12 dGH

KH

1 - 6 dKH

TDS

55 - 240 ppm

Conductivity

86 - 375 uS/cm

Species description

Geographical Origin and Habitat: This species has an extremely restricted range and is endemic to the upper Rio Negro basin, specifically the Igarapé Castanha, a tributary of the Rio Tiquié in Amazonas State, Brazil. It inhabits small blackwater streams characterized by warm, extremely soft, and acidic water, with slow to moderate currents and sandy bottoms covered with decomposing leaf litter.
Taxonomy and Morphology: Belonging to the family Callichthyidae, subfamily Corydoradinae. Described scientifically in 2017 by Lima and Sazima, this species was previously known in the aquarium hobby by the code CW011. It features the typical Corydoras body shape, protected by overlapping bony plates instead of scales, and a downward-facing mouth equipped with sensory barbels. It reaches about 5 cm in length.
Social Behavior: It is a peaceful, gregarious, bottom-dwelling fish that must be kept in groups of at least 6-8 specimens. A fascinating biological aspect is its mimicry of Corydoras tukano; sharing the same habitat, the less common Corydoras desana blends into schools of C. tukano for predator protection. Like other Corydoras, it has intestinal respiration allowing it to gulp air.
Coloration and Sexual Dimorphism: The body has a light beige or golden ground color, marked by a prominent dark longitudinal stripe running along the flank to the tail base, and a characteristic dark rounded patch under the dorsal fin. The dorsal fin often has dark pigmentation on the front. No visible sexual differences exist except that mature females are rounder and larger.

Care, breeding and tankmates

Aquarium Setup: Requires a species-specific or community aquarium of at least 80 liters (approx. 20 gallons). It is of critical importance to use a substrate of fine, rounded sand, as sharp gravel can damage or erode their delicate sensory barbels during foraging. Furnish the tank with driftwood, roots, and dry Indian almond leaves (Catappa) to create shaded areas.
Diet and Feeding: Lighting should be dim or filtered through floating plants (such as Pistia or Limnobium) to make the fish feel secure and encourage natural behaviors. The water temperature must be kept stable between 23°C and 26°C (73-79°F). Heating can be managed with a standard heater, ensuring there are no sudden temperature changes.
Water Quality: The water must be very soft and acidic, simulating a blackwater habitat: pH between 5.5 and 6.5, general hardness (GH) below 6 dGH, and carbonate hardness (KH) close to zero. The use of reconstituted reverse osmosis water and the addition of peat extracts or leaves to release beneficial humic acids and tannins is highly recommended.
Compatibility and Cohabitation: A benthic omnivore. The diet must be varied and of high quality, including specific sinking bottom-dweller tablets, frozen bloodworms, brine shrimp, tubifex, and live foods. Given their nature, it is important to ensure that food actually reaches the bottom of the tank and is not entirely consumed by fish swimming in the mid-water.
Aquarium Breeding: An extremely peaceful species. It coexists perfectly with small characins (tetras), pencilfish (Nannostomus), dwarf cichlids of the genus Apistogramma, and other peaceful Corydoras. Avoid housing them with large, territorial, or aggressive fish that could intimidate them or treat them as prey, which would jeopardize their health.
Risks and Diseases: Barbels are prone to bacterial infections if the substrate is dirty or sharp; regular cleaning of the sand by siphoning is essential. They are highly sensitive to heavy metals, copper, and sudden increases in ammonia and nitrite levels, which can be fatal. Maintain efficient filtration but keep the water flow moderate.

Geographic Origin and Distribution

This species has an extremely restricted range and is endemic to the upper Rio Negro basin, specifically the Igarapé Castanha, a tributary of the Rio Tiquié in Amazonas State, Brazil. It inhabits small blackwater streams characterized by warm, extremely soft, and acidic water, with slow to moderate currents and sandy bottoms covered with decomposing leaf litter.

Origin

Tropical oceans and reefsAmazon, Orinoco, and GuianasEast Asia

Fish profile

Temperament
Peaceful
The temperament of Corydoras desana is exceptionally docile, making them entirely safe for peaceful and planted community setups. They are highly social animals and rely on the presence of conspecifics to exhibit their natural, confident behaviors. Aggression is virtually non-existent, even among competing males during intense spawning events.
Diet
Omnivore
As a benthic omnivore, Corydoras desana primarily feeds on small insects, worms, and crustaceans in the wild. In the aquarium, they readily accept high-quality sinking pellets, wafers, and live or frozen foods like bloodworms and daphnia. It is crucial to ensure food reaches the bottom, as they will not typically feed from the surface.
Sex ratio
School
Corydoras desana is a highly gregarious fish that must be kept in groups of at least six individuals to feel secure and behave naturally. For breeding purposes, a sex ratio of two or three males per female is highly recommended. This ensures higher fertilization rates and closely mimics their natural schooling and spawning dynamics.
Feeding frequency
Twice daily
It is recommended to feed Corydoras desana one to two times daily, offering only what they can consume within a few minutes. Because they are bottom feeders, night-time feeding can be beneficial to avoid competition from fast mid-water fish. A varied feeding schedule ensures optimal health, longevity, and vibrant coloration.
Bioload
The Corydoras desana produces a relatively low to moderate bioload, consistent with other members of its genus. Because it is a small, efficient scavenger, it helps keep the substrate clean of uneaten food. However, adequate biological filtration and regular maintenance are still necessary to process the waste of a proper school.
Flow
Strong
This catfish prefers a gentle to moderate water flow that mimics the slow-moving streams and tributaries of its native habitat. While Corydoras desana appreciates well-oxygenated water, overly strong currents can easily exhaust them over time. Providing resting areas with minimal flow and ample cover is essential for their well-being.
Jump risk
No
Reproduction
Oviparous
Breeding Corydoras desana often involves providing a significant drop in water temperature and frequent water changes to simulate the rainy season. Females will lay adhesive eggs on plant leaves, aquarium glass, or other smooth surfaces after a complex mating dance. The parents exhibit no parental care and may consume the eggs, so removing them to a separate rearing tank is highly advisable.
Compatibility & tankmates
Peaceful
This species is extremely peaceful and makes an excellent addition to most community aquariums. Corydoras desana should be kept with other similarly sized, non-aggressive fish that will not outcompete them for food. They thrive in the company of small tetras, rasboras, and peaceful dwarf cichlids.
Tank level
Bottom
This species is an obligate bottom-dweller, spending nearly all of its time resting, exploring, or foraging along the substrate. Corydoras desana will continuously sift through fine sand using its sensitive barbels to locate hidden food particles. They only leave the bottom layer briefly to gulp surface air or when suddenly startled.

Window to the official scientific data of the species

Data synced on: 06/15/2026

Scientific Parameters & Models

Trophic level
3 ± 0.3 se
Resilience
High (less than 15 months)
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.02455, b = 3
VulnerabilityLow vulnerability (10 / 100)

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

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Variants and close relatives

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Last updated: 06/30/2026
Desana Corydoras (Corydoras desana) Care Guide & Tank Setup | Atlarium