Bronze cory - Corydoras aeneus

Scientific name: Corydoras aeneus

Common name: Bronze cory

Family: Callichthyidae

Usual size in fish tanks: 6 - 8 cm (2.36 - 3.15 inch)

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Recommended pH range for the species: 5.8 - 7.7

Recommended water hardness (dGH): 4 - 12°N (71.43 - 214.29ppm)

0°C 32°F30°C 86°F

Recommended temperature: 22 - 29 °C (71.6 - 84.2°F)

The way how these fish reproduce: Spawning

Where the species comes from: South America

Temperament to its own species: peaceful

Temperament toward other fish species: peaceful

Usual place in the tank: Bottom levels

Food and Feeding

Bronze Corydoras are omnivorous and will readily accept a variety of foods in the aquarium. For their staple diet, offer quality sinking pellets or flakes designed for bottom dwellers. To ensure a well-balanced diet, supplement with live or frozen foods such as bloodworms, brine shrimp, and daphnia. They also appreciate broken-up algae wafers. To keep them in optimal condition, feed small portions two to three times daily. Providing a varied diet will not only enhance their natural coloration but also boost their overall health. Avoid overfeeding, as it can lead to poor water quality and health issues.

Origin

The Bronze Cory (Corydoras aeneus) is native to various freshwater habitats across South America, including rivers, streams, and even some of the islands off the coast. They are often found in slow-moving, shallow waters with soft, sandy substrates and plenty of leaf litter, which provides both food and shelter.

Sexing

Distinguishing between males and females is relatively easy, especially when they reach maturity. When viewed from above, mature females are generally larger, plumper, and rounder in body shape compared to the smaller, slimmer males. This difference becomes particularly noticeable during the breeding season, when the females are filled with eggs.

Breeding

Breeding Bronze Corydoras in the home aquarium is relatively straightforward, provided they are kept in groups of at least 6 or more. This schooling behavior allows them to form natural pairs. To induce spawning, condition the fish with a protein-rich diet, including bloodworms and brine shrimp. Perform frequent water changes to mimic their natural environment and lower the water temperature slightly, which often triggers spawning behavior.

During spawning, the female will clean a chosen surface, such as a broad leaf or the aquarium glass, where she will deposit the eggs. After fertilization, the eggs will adhere to the surface. Typically, the eggs hatch within 4 to 5 days, and the fry will become free-swimming a few days later. Feed the fry with powdered fry foods or specially formulated liquid foods until they are large enough to accept newly hatched brine shrimp. Providing plenty of hiding spots with plants or decor will help the fry feel secure as they grow.

Lifespan

With proper care and a clean, stable environment, the Bronze Cory can live for up to 5 years. Regular water changes and a varied diet are key to ensuring they reach their full lifespan.

Tank Setup and Care

To replicate their natural habitat, use a soft sand or smooth gravel substrate to protect their sensitive barbels. The tank should include plenty of plants and hiding spots using driftwood, rocks, or caves, as these fish appreciate shaded areas. A minimum tank size of 75 liters (20 gallons) is recommended for a small group. Maintain a water temperature between 22-29°C (71.6-84.2°F), with a pH range of 5.8-7.7, and water hardness between 4-12°N (71.43-214.29 ppm). Gentle filtration and regular water changes are essential to maintain the water quality, as Bronze Corydoras are sensitive to poor conditions.

Tankmates

Bronze Corydoras are peaceful bottom dwellers, making them compatible with a variety of other non-aggressive tankmates. Ideal companions include:

They do best in groups of their own species, so it's advisable to keep at least 6 Bronze Corydoras together to observe their natural schooling behavior.

Short Description

The Bronze Cory (Corydoras aeneus) is a peaceful bottom-dweller known for its hardiness and adaptability. Its armor-like scales overlap, providing optimal protection against predators. It also has a locking spine that makes it difficult for predators to swallow and can cause the fish to get stuck in nets when being captured. Special care must be taken when removing them from the tank to avoid injury. Their playful nature and ease of care make them a popular choice for community aquariums.