Corydoras julii — Julii Corydoras
Family: Callichthyidae
Origin: Eastern Brazil — coastal river systems
Size: Up to 5.5 cm (2.2 inches)
Lifespan: 5–8 years
 
Natural Habitat
Environment: Slow-moving streams and flooded forest areas
Water Conditions: Soft, slightly acidic to neutral waters with sandy substrates
Temperature Range: 22–26°C (72–79°F)
 
Physical Description
Body Shape: Compact, arched body typical of Corydoras
Coloration:
Light silver body with dark spotted patterning
Distinct black line along the mid-body (may be broken)
Head marked with fine black dots (not reticulated)
Fins: Mostly translucent with scattered dark spots
Note: Often confused with Corydoras trilineatus (Three-Lined Cory), which has a more reticulated head and longer, continuous lateral stripe.
 
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: 22–26°C (72–79°F)
Water Flow: Gentle
Substrate: Fine sand recommended to avoid barbel damage
Décor: Driftwood, leaf litter, shaded hiding spots, and aquatic plants
Filtration: Gentle, oxygen-rich with excellent water quality
 
Diet
Type: Omnivorous bottom-feeder
Preferred Foods:
Sinking pellets, bloodworms, daphnia, brine shrimp
Occasional blanched vegetables or algae wafers
Feeding Frequency: 1–2 times daily
 
Behavior & Tank Mates
Temperament:
Peaceful and social; thrives in groups of 5 or more
Active bottom forager, often sifting through sand together
Compatible Tank Mates:
Other peaceful community fish (e.g., small tetras, rasboras, dwarf cichlids)
Avoid aggressive or overly boisterous tank mates
Behavior Notes:
Day-active and curious; may dart to surface for air occasionally
 
Breeding
Spawning Method: Egg layer
Breeding Conditions:
Triggered by cool water changes and high-protein diet
Eggs laid on tank walls or broad leaves
Fry Care:
Eggs hatch in 3–4 days
Feed fry with infusoria or powdered fry food