Encyclopaedia

FishFreshwaterEasy

Bader's Corydoras

Corydoras baderi

An elegant, small Brazilian Corydoras distinguished by two dark lateral stripes on a light cream base. It is incredibly peaceful and thrives in shaded, blackwater setups.

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

Share

Check out Bader's Corydoras on Atlarium

PracticeRecognition quizzesPhotos, names, origins, and puzzles to review Atlas species.Open quizzes
Water Temperature

22 - 26 °C

pH Value

6 - 7.2

Water type

Freshwater

Tank level

Bottom

Adult size

5 cm

Minimum tank volume

>= 80 L

Minimum group

>= 6

GH

2 - 12 dGH

KH

2 - 10 dKH

TDS

50 - 280 ppm

Conductivity

78 - 438 uS/cm

Species description

Geographical Origin and Habitat: South America: Paru River basin, in the state of Pará, Brazil. Mainly frequents small streams within the primary forest, with heavy shading and substrates rich in decomposing dead leaves and submerged branches.
Taxonomy and Morphology: Belongs to the Callichthyidae family. A medium-sized, stocky Corydoras, reaching 5 cm (2 inches). Short and rounded snout profile. Belongs to a group of phenotypically very similar Corydoras originating from the Amazon basin, often difficult for non-experts to identify.
Social Behavior: Typical gregariousness. Peaceful, tireless searcher on the bottom, prefers to move in small cohesive schools of at least 6 or more individuals to feel protected. Tends to rest in the shade of large roots during peak lighting hours.
Coloration and Sexual Dimorphism: Light background, cream-grayish, characterized by a wide black longitudinal band running laterally across the flank. The dorsal fin has irregular black speckles. Mature females have a noticeably stockier build and a markedly convex abdominal profile.

Care, breeding and tankmates

Aquarium Setup: Substrate imperatively in fine sand (without it, the fish will waste away). Create an amber environment (blackwater) by inserting alder cones, oak or Ketapang leaves, and roots to provide shaded areas. Dense lateral planting and surface floaters to lower light intensity.
Diet and Feeding: Omnivorous detritivore. In the wild, it sifts the mud looking for annelids, small benthic crustaceans, and organic material. Provide specific Corydoras tablets that sink rapidly, alternated with live or frozen foods (Artemia and Tubifex or Bloodworms) to ensure vitality and robustness.
Water Quality: Demands excellent chemical conditions. Sensitive to high nitrate levels caused by decomposing feeds. Optimal thermal range: 22-26°C (72-79°F), pH 6.0 - 7.2 (tends to prefer more acidic and humic-rich waters compared to common store Corydoras). Medium-low hardness.
Compatibility and Cohabitation: Totally peaceful, it is the quintessence of the fish for the tranquil Amazonian community aquarium. Optimal tankmates: gregarious Tetras (Nannostomus, Hyphessobrycon), Loricariids (Otocinclus), and small Cichlids (e.g. Biotoecus, Apistogramma) if the tank offers sufficient vital space on the bottom.
Aquarium Breeding: Rarely documented in the hobby due to the scarcity of the species. Similar to other species of the genus: requires a sudden drop in temperature (with cool reverse osmosis water) and high atmospheric pressure. Lays single adhesive eggs on vegetation or glass.
Risks and Diseases: Vulnerable to the irreversible wear of delicate tactile barbels if housed on sharp gravel or rough fertilized substrates. High sensitivity to secondary fungal pathologies in case of wounds or bites inflicted by other fish on the bottom.

Geographic Origin and Distribution

South America: Paru River basin, in the state of Pará, Brazil. Mainly frequents small streams within the primary forest, with heavy shading and substrates rich in decomposing dead leaves and submerged branches.

Origin

Tropical oceans and reefsAmazon, Orinoco, and Guianas

Fish profile

Temperament
Semi-aggressive
Corydoras baderi are peaceful, social schooling fish that thrive when kept in groups. Keeping them in numbers of at least six individuals greatly reduces their stress and promotes natural behaviors. They are completely harmless to plants and other tank inhabitants.
Diet
Omnivore
These are omnivorous bottom feeders that require a varied diet to thrive. Their meals should include high-quality sinking pellets, wafers, and live or frozen foods like bloodworms. A balanced diet ensures proper growth and vibrant coloration for Corydoras baderi.
Sex ratio
Specific M:F ratio
Maintaining a ratio of two or three males for every female is ideal for breeding purposes. This ratio encourages natural spawning behaviors and increases the chances of successful fertilization. In non-breeding community tanks, the exact ratio for Corydoras baderi is less critical.
Feeding frequency
Twice daily
They should be fed small amounts once or twice a day. It is important to provide only what Corydoras baderi can consume within a few minutes to prevent water fouling. Occasional fasting days can also be beneficial for their digestive health.
Bioload
The Corydoras baderi has a relatively low bioload compared to many other species of similar size. They are efficient scavengers that help keep the substrate clean, which slightly offsets their waste production. However, adequate biological and mechanical filtration is still necessary to maintain optimal water quality in the aquarium.
Flow
Stagnant
They prefer moderate water movement that simulates their natural riverine habitats. A gentle current provides necessary oxygenation without exhausting the fish. Avoid overly strong flow that could sweep Corydoras baderi away or cause stress.
Reproduction
Oviparous
Breeding Corydoras baderi in captivity is possible but requires specific water conditions and conditioning. They are egg layers that typically deposit their adhesive eggs on broad leaves or the aquarium glass. Parents may eat the eggs, so it is often best to raise the fry in a separate tank.
Compatibility & tankmates
They are incredibly peaceful and make excellent additions to community aquariums. Corydoras baderi gets along well with most other peaceful, similarly sized fish. Aggressive or large tank mates should be avoided as they may intimidate or harm them.
Tank level
Bottom
They are obligate bottom dwellers that spend the majority of their time on the substrate. Corydoras baderi constantly rummage through sand or smooth gravel in search of food. Very rarely will they be seen swimming in the middle or upper levels of the water column.

Window to the official scientific data of the species

Data synced on: 06/15/2026

Scientific Parameters & Models

Trophic level
3 ± 0.4 se
Resilience
High (less than 15 months)
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.00741, b = 3.14
VulnerabilityLow vulnerability (10 / 100)

Image gallery

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

Related species

Recommendations grouped by close relatives, companion choices, and similar care.

Variants and close relatives

Same atlas type, nearby scientific identity, genus, or family.

Banded Corydoras

Banded Corydoras

Corydoras vittatus

View details->
Bicolor Corydoras

Bicolor Corydoras

Corydoras bicolor

View details->
Broad Corydoras

Broad Corydoras

Corydoras latus

View details->
Carla's Cory

Carla's Cory

Corydoras carlae

View details->
Condiscipulus Cory

Condiscipulus Cory

Corydoras condiscipulus

View details->
Cope's Corydoras

Cope's Corydoras

Corydoras copei

View details->
Corantijn Cory

Corantijn Cory

Corydoras breei

View details->
Evelyn's Corydoras

Evelyn's Corydoras

Corydoras evelynae

View details->
False Blochi Cory

False Blochi Cory

Corydoras delphax

View details->
Fawn Cory

Fawn Cory

Corydoras cervinus

View details->
Filament Cory

Filament Cory

Corydoras filamentosus

View details->
Fowler's Cory

Fowler's Cory

Corydoras fowleri

View details->
Geoffroy's Corydoras

Geoffroy's Corydoras

Corydoras geoffroy

View details->
Gery's Corydoras

Gery's Corydoras

Corydoras geryi

View details->
Gomez's Cory

Gomez's Cory

Corydoras gomezi

View details->
Gray Cory

Gray Cory

Corydoras griseus

View details->

Recommended companions

Compatible cards from coherent ecosystems with matching parameters.

Alternanthera reineckii "rosaefolia minor"
Plant

Alternanthera reineckii "rosaefolia minor"

Alternanthera reineckii "rosaefolia minor"

View details->
Ammannia mauritiana
Plant

Ammannia mauritiana

Ammannia mauritiana

View details->
Ammannia sp. 'Bonsai'
Plant

Ammannia sp. 'Bonsai'

Ammannia sp. 'Bonsai'

View details->
Bacopa sp. "Japan"
Plant

Bacopa sp. "Japan"

Bacopa sp. "Japan"

View details->
Bolbitis heteroclita
Plant

Bolbitis heteroclita

Bolbitis heteroclita

View details->
Bucephalandra pygmaea "Bukit Kelam / Sintang"
Plant

Bucephalandra pygmaea "Bukit Kelam / Sintang"

Bucephalandra pygmaea "Bukit Kelam / Sintang"

View details->
Bucephalandra pygmaea "Kapit"
Plant

Bucephalandra pygmaea "Kapit"

Bucephalandra pygmaea "Kapit"

View details->
Bucephalandra sordidula
Plant

Bucephalandra sordidula

Bucephalandra sordidula

View details->
Bucephalandra sp. "Bodok"
Plant

Bucephalandra sp. "Bodok"

Bucephalandra sp. "Bodok"

View details->
Bucephalandra sp. "Braun-rot narrow"
Plant

Bucephalandra sp. "Braun-rot narrow"

Bucephalandra sp. "Braun-rot narrow"

View details->
Bucephalandra sp. "Braun-rot" ("Serimbu")
Plant

Bucephalandra sp. "Braun-rot" ("Serimbu")

Bucephalandra sp. "Braun-rot"

View details->
Bucephalandra sp. "Gunung Sumpit"
Plant

Bucephalandra sp. "Gunung Sumpit"

Bucephalandra sp. "Gunung Sumpit"

View details->
Bucephalandra sp. "Kedagang"
Plant

Bucephalandra sp. "Kedagang"

Bucephalandra sp. "Kedagang"

View details->
Blyxa alternifolia
Plant

Blyxa alternifolia

Blyxa alternifolia

View details->
Blyxa cf. vietii
Plant

Blyxa cf. vietii

Blyxa cf. vietii

View details->
Arrowhead Anubias
Plant

Arrowhead Anubias

Anubias hastifolia

View details->

Similar care

Cards with similar requirements, difficulty, habitat, and husbandry profile.

Green Gold Cory

Green Gold Cory

Corydoras melanotaenia

View details->
Içana Cory

Içana Cory

Corydoras incolicana

View details->
Kane's Corydoras

Kane's Corydoras

Corydoras kanei

View details->
Lambert's Cory

Lambert's Cory

Corydoras lamberti

View details->
Leopard Cory

Leopard Cory

Corydoras leopardus

View details->
Loreto Cory

Loreto Cory

Corydoras loretoensis

View details->
Maculifer Cory

Maculifer Cory

Corydoras maculifer

View details->
Many-spotted Cory

Many-spotted Cory

Corydoras polystictus

View details->
Garbe's Corydoras

Garbe's Corydoras

Corydoras garbei

View details->
Lacerda's Cory

Lacerda's Cory

Corydoras lacerdai

View details->
Burgess's Corydoras

Burgess's Corydoras

Corydoras burgessi

View details->
Flag-tail Cory

Flag-tail Cory

Corydoras robineae

View details->
Coppename Cory

Coppename Cory

Corydoras coppenamensis

View details->
Agassiz's Corydoras

Agassiz's Corydoras

Corydoras agassizii

View details->
Blacktop Corydoras

Blacktop Corydoras

Corydoras acutus

View details->
Concolor Cory

Concolor Cory

Corydoras concolor

View details->
Last updated: 06/30/2026
Bader's Corydoras (Corydoras baderi) Care Guide & Tank Setup | Atlarium