Bronze Corydoras (Corydoras aeneus) is a peaceful, bottom-dwelling freshwater catfish beloved by aquarists for its hardy nature and charming behavior.

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Species Overview

• Scientific Name: Corydoras aeneus
• Common Names: Bronze Cory, Green Cory, Bronze Catfish
• Family: Callichthyidae
• Size: Up to 2.5 inches (6–7 cm)
• Lifespan: 5–10 years
• Temperament: Peaceful, social, and shy 

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Natural Habitat

• Distribution: Widely found across South America, including Argentina, Colombia, Venezuela, Trinidad and Tobago 
• Environment: Prefers slow-moving rivers, muddy substrates, and shallow waters. Can survive in low-oxygen environments by gulping air at the surface 

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Appearance

• Body: Bronze to greenish sheen, sometimes with albino or black variants
• Armor: Covered in bony plates (scutes)
• Fins: Transparent with possible orange or reddish tint
• Sexual Dimorphism: Females are larger and rounder, especially when gravid 

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Aquarium Care

• Tank Size: Minimum 10 gallons, ideally larger for groups
• Substrate: Soft sand or smooth gravel to protect barbels
• Water Parameters:
  • Temperature: 72–79°F (22–26°C)
  • pH: 6.0–8.0
  • Hardness: 5–19 dGH
• Tank Setup:
  • Provide hiding spots (wood, rocks, plants)
  • Use gentle filtration
  • Maintain low to moderate lighting 

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Behavior & Compatibility

• Schooling Fish: Keep in groups of 5 or more
• Tank Mates: Compatible with peaceful species like:
  • Tetras
  • Otocinclus
  • Swordtails
  • Other Corydoras
• Avoid: Aggressive fish like Oscars or large cichlids 

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Diet

• Omnivorous: Eats a mix of plant and animal matter
• Preferred Foods:
  • Sinking pellets
  • Bloodworms, brine shrimp, daphnia
  • Blanched vegetables (spinach, zucchini)
• Feeding Tip: Ensure food reaches the bottom; use tongs if needed 

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Breeding

• Method: Egg-layers; spawn in the classic "T-position"
• Trigger: Large water change with cooler water and increased oxygen
• Eggs: Sticky, laid on cleaned surfaces; hatch in 4–5 days
• Fry Care:
  • Feed infusoria or powdered food initially
  • Transition to baby brine shrimp
  • Perform frequent water changes 

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