Bronze corydoras

Aquarium fish: Bronze corydoras (Corydoras aeneus)
Size: 7 cm
Origin: South America
Water temperature: 20-28 ° C
Aquarium volume: 54 l

Bronze corydoras (Corydoras aeneus ) – a small, freshwater fish from the Cuirassidae family.


The species lives in rivers, streams and lakes from Trinidad to Argentina. Most of the fish available commercially come from livestock farms.

Characteristics and disposition

Reaches a length of 7 cm. A body with a metallic sheen.

The brown body of this fish is covered with two rows of bone plates; the taller one has a greyish green sheen. Gill cover and part of the head below the eyes that move independently of each other. It comes in many color varieties, e.g. albino cuirass , gold, gold-copper and even black . The sex of the fish is difficult to distinguish .

Females are slightly more rounded and larger. Mild and peaceful. Kiryski also breathe through the intestine and often swim to the water surface to get air. They are perfect for a social aquarium. It is best to keep a group of min.

6 pieces.

Nutrition and feeding

Kiryskom can be given fine food falling to the bottom, live, frozen and dry in flakes or tablets.


Kiryski requires a soft (preferably sandy) ground so that they do not damage their whiskers when digging for food. An aquarium with dimensions of 60x30x30 cm, equipped with numerous hiding places made of roots or stones, will be suitable for a group. In a general aquarium they can be kept with small fish, e.g.

tetra , barb , cichlid . They are hardy fish that easily adapt to new conditions.


Relatively easy, they often breed unexpectedly in well-kept social aquariums. Kiryski breeds best in groups, where there are 2 males for each female. The fish are transferred to the breeding aquarium with dimensions of at least 45x30x30 cm and we feed them abundantly with live or frozen food.

Then we make a large water change 5 ° C colder than that in the tank. This operation may be repeated for several days. During spawning, the cuiras are more agitated, e.g. they swim continuously up and down the entire length of the reservoir. The males start chasing the females and the act begins.

The female touches the area of ​​the male’s anal fin with her mouth and swallows his milk. It then releases the eggs on its own anal fins and fertilizes them. Roe sticks to plants, windows or other elements. By breeding cuiras in a group, we can get even several hundred eggs. They are not considered to eat their own eggs, but adults are best separated.

Hatching takes about 3 days. We feed the fry with small foods, e.g. brine shrimp larvae, tubers. The key to rearing fry is to maintain appropriate water quality (frequent changes).


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