The Bronze Cory (Corydoras aeneus) is one of the most popular and hardy catfish in the aquarium trade. Known for its bronze-golden coloration, peaceful temperament, and schooling nature, it is a favorite among beginners and experienced aquarists alike.
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The Bronze Cory (Corydoras aeneus) is one of the most popular and hardy catfish in the aquarium trade. Known for its bronze-golden coloration, peaceful temperament, and schooling nature, it is a favorite among beginners and experienced aquarists alike.
Bronze Cories have a metallic bronze-to-greenish body with a lighter belly. Their eyes are large and expressive, with a short, rounded snout and downward-facing mouth equipped with sensory barbels. Their bodies are covered with bony armor plates, and their fins are generally translucent. They can exhibit slight color variations depending on breeding line, mood, or water conditions.
5–10 years with proper care
Omnivorous; eats sinking pellets, algae wafers, live or frozen foods (bloodworms, brine shrimp, daphnia), and vegetable matter.
Bronze Cories are among the best choices for aquarists seeking hardy, social, and community-friendly bottom dwellers. Their adaptability, schooling behavior, and ease of breeding make them a staple in the hobby. Keeping them in groups not only enhances their natural activity but also ensures they remain stress-free and healthy. They are a cornerstone species for community aquariums.
Beginner to Intermediate
20 gallons (for a school of 6 or more)
6.0 to 7.5
2–15 dGH
72–78°F (22–26°C)
2.5 to 3 inches
Ideal tank mates include Tetras, Guppies, Mollies, Platies, Swordtails, Rasboras, peaceful Gouramis, Shrimp, Snails, and other small, non-aggressive fish.
Avoid aggressive or large fish such as Cichlids (Oscars, Jack Dempseys), Arowanas, large Barbs, or Bettas. These fish may stress or harm Corydoras.
Corydoras aeneus
Callichthyidae
Native to South America – widely distributed in Colombia, Venezuela, Trinidad, Brazil, and Argentina. Extensively bred in captivity for the aquarium trade.
Highly social and schooling; should always be kept in groups of at least 6 to prevent stress and encourage natural behaviors.
Feed twice daily with a mix of high-quality sinking pellets, algae wafers, and occasional live or frozen foods. Supplement with blanched vegetables like zucchini, cucumber, or spinach. Ensure food reaches the bottom so Corydoras can access it.
pH: 6.0–7.5, Temperature: 72–78°F (22–26°C), Hardness: 2–15 dGH, Ammonia/Nitrite: 0 ppm, Nitrate: <20 ppm
Barbel erosion (from sharp substrates or dirty tanks), ich, fin rot, bacterial infections, and stress-related illnesses. Prevent by maintaining clean water, soft sandy substrate, and avoiding rough decorations.
Bronze Corydoras are peaceful, social schooling fish that thrive in groups of at least 6 or more. They are active bottom dwellers, often seen swimming together in synchronized patterns while searching for food. Their shy but curious nature makes them excellent community fish. They are completely non-aggressive and often retreat when confronted by larger fish.
Bronze Corydoras (Corydoras aeneus) are one of the most widespread Corydoras species and have been bred extensively in captivity. Their metallic bronze sheen, hardy nature, and active schooling behavior make them ideal community tank members. They are also one of the first species many aquarists keep due to their resilience and adaptability. Bronze Cories are 'armored catfish,' meaning their bodies are covered with bony plates instead of scales. Their delicate barbels are highly sensitive and should not be exposed to sharp substrates. In addition to being hardy, they play an ecological role in aquariums by consuming leftover food, reducing waste accumulation, and keeping the substrate aerated.