Fish, Tanks and Ponds

Fish, Tanks and Ponds
A comprehensive guide to fish

Corydoras aeneus

Bronze cory

Bronze cory, Corydoras aeneusBronze cory, Corydoras aeneus
Photos by Andy Rapson


Corydoras: Greek, kory = helmet + greek, doras = skin

General Notes:

Corydoras aeneus is probably the widest spread of all the Corydoras species, it is commercially bred in vast numbers in the far east and is probably available in every aquatic shop throughout the world. C aeneus also has a wide range of colour patterns, more commonly there is; the Bronze and Albino variety, but some newly found colour varieties are being found in the wild, which may in fact turn out to be separate species; aeneus (Black), aeneus (Peru green stripe) and aeneus (Peru gold stripe), to name some. C. aeneus should be kept on a substrate of rounded gravel, or preferably sand, as sharp gravel can erode their barbells, making them useless for breeding, especially the females. Even when keeping them on gravel or sand, the substrate needs to be kept clean as a build up of bacteria in the substrate will also erode their barbells. C. aeneus is a shoaling fish that needs the company of it's own species, and is better kept in groups of six or more.


Omnivore; live or frozen food, flake and pellet food are all eagerly accepted.


When Corydoras are kept in good condition, viewed from above females are usually broader than males, and looking at the fish from the side, females tend to be deeper and plumper looking than males. Females grow slightly larger than males.


Use a separate breeding aquarium with a sponge filter and a thin layer of sand for substrate. Introduce two well conditioned males and one well conditioned female after a small period of separation. Make a small water change using slightly cooler water to stimulate spawning.
After the fish have spawned remove the adults. Then it is just a matter of waiting until the fry are free swimming before commencing to feed them. The fry will accept powdered flake food, newly hatched brine shrimps and micro worms.

Wild status

The wild status of C. aeneus has not been evaluated.

Information at a glance

pH: 6 - 7'2
dGH: 4 - 12
Temperature: 22 - 26°C (72 - 78°F)
Diet: Omnivore
Size: 6.5cm (2,7in)
Min tank size: 60 litres
Difficulty level: Easy
Aquarium type: Community
Swimming level: Bottom

Distribution and habitat

distribution map for Bronze cory, Corydoras aeneus

Origin: Trinidad, Bolivia, Brazil, Ecuador, Colombia, Peru, Surinam and Venezuela.

Habitat: Slow running or still water with a soft substrate.


Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Callichthyidae
Genus: Corydoras
Species: C. aeneus (Gill, 1858)

Common name:
Bronze cory

Synonyms: Hoplosoma aeneum, Callichthys aeneus, Corydoras microps, Corydoras venezuelanus, Corydoras macrosteus, Corydoras schultzei