Saltwater Aquarist

Bronze Cory

(Corydoras aeneus)

Bronze Cory (Corydoras aeneus) in a freshwater aquarium

Species Description…

Scientific Name: Corydoras aeneus
Common Name: Bronze Cory
Species Group: Corydoras
Tank Type: Community
Care Level: Beginner
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Bottom Dweller
Max Fish Length: 3 (inches)
Min Aquarium Size: 19 (gallons)
Native Range: Widespread in South America, from Trinidad and Venezuela south to Argentina, including the Amazon and de la Plata basins.
Min Temperature: 70°F
Max Temperature: 81°F
Min pH: 6.0
Max pH: 8.0
Min GH: 2 dGH
Max GH: 15 dGH
Min Group Size: 6
Breeding: Easy
Lifespan: years

Overview

  • The Bronze Cory (Corydoras aeneus) is one of the best-known catfish in the hobby.
  • Wild fish range across much of South America, from Trinidad to Argentina.
  • Grows to about 3 in (7.5 cm) standard length.
  • Albino and long-finned forms are bred. The origin of commercially bred “aeneus” is unclear.

Feeding

  • A foraging omnivore. Accepts sinking dried foods plus small live and frozen foods such as bloodworm.
  • Feed it directly. It cannot live on leftovers and is not a tank “cleaner.”

Habitat

  • A tank with a base of 31 × 12 in (80 × 30 cm) for long-term care.
  • Fine sand is ideal. Smooth, rounded gravel is OK if kept very clean.
  • Provide some cover.
  • Water: 70–81°F (21–27°C), pH 6.0–8.0, GH 2–15.

Fish Care

  • Keep the substrate clean to protect its barbels. [UNVERIFIED]

Compatibility

  • Peaceful. Good with most small community fish.

Aquarium Behavior

  • Peaceful and sociable.
  • Keep a group of at least 4–6.

Breeding

  • Use 2 males per female if possible.
  • When females are full of eggs, do a large (50–70%) water change with cooler water, and boost flow and oxygen. Repeat daily until they spawn.
  • Eggs are usually laid on the glass. Offer fine-leaved plants or mops as well.