Corydoras schultzei (Black morph) — Black Venezuelan Corydoras
Family: Callichthyidae
Origin: Selectively bred from populations in Venezuela (possibly derived from Corydoras aeneus)
Size: Up to 6.5 cm (2.5 inches)
Lifespan: 5–10 years
 
Natural Habitat
Environment: Originally found in soft, slow-flowing streams and floodplains in Venezuela
Water Conditions: Soft, acidic to neutral water with a sandy or muddy substrate
Temperature Range: 22–27°C (72–81°F)
 
Physical Description
Body Shape: Typical Corydoras profile — robust with a domed back
Coloration:
Deep, velvety black body with a subtle metallic sheen
Fins typically dark, occasionally translucent at the tips
Fins: Sturdy and well-formed, often slightly darker than the body
Note: Though sometimes called Corydoras aeneus "Black", this morph is most accurately linked to Corydoras schultzei, believed to be a naturally occurring or closely related variant.
 
Aquarium Care
Tank Size: Minimum 60 litres (15 gallons) for a group
Water Parameters:
pH: 6.0–7.5
Hardness: Soft to moderately hard
Temperature: 22–27°C (72–81°F)
Water Flow: Gentle
Substrate: Fine sand or smooth gravel to protect sensitive barbels
Décor: Plants, driftwood, shaded hiding spots
Filtration: Stable, oxygen-rich, and well-filtered water
 
Diet
Type: Omnivorous bottom-feeder
Preferred Foods:
Sinking pellets, bloodworms, brine shrimp, daphnia
Algae wafers and occasional blanched vegetables
Feeding Frequency: 1–2 times daily
 
Behavior & Tank Mates
Temperament:
Peaceful, hardy, and social
Should be kept in groups of 5 or more for natural behavior
Compatible Tank Mates:
Tetras, rasboras, dwarf cichlids, livebearers, and other peaceful species
Avoid aggressive or overly large fish
Behavior Notes:
Active during the day, often foraging in groups
Will occasionally gulp air from the surface
 
Breeding
Spawning Method: Egg layer
Breeding Conditions:
Cool water changes and high-protein diet may induce spawning
Eggs laid on glass or flat surfaces
Fry Care:
Eggs hatch in 3–5 days
Feed fry infusoria or liquid fry food initially, then baby brine shrimp
 
Conservation Status
IUCN Status: Not Evaluated (selective aquarium morph)
Notes: A visually striking, hardy Corydoras ideal for peaceful community tanks; selectively bred for its dark, uniform coloration