Bronze cory
Osteogaster aeneus
Bronze sheen; albino cultivated forms also occur. A social armoured catfish that searches the substrate for food. It needs dedicated sinking food, not just leftovers.
At a glance
- Scientific name
- Osteogaster aeneus
- Dutch name
- Bronzen pantsermeerval
- Water temperature
- 21–27 °C
- pH
- 6–8
- Adult length, up to approximately
- 7.5 cm SL
- Experience
- Basic knowledge
- Also known as
- Corydoras aeneus
- General hardness (GH)
- 2–15 °dGH
- Starting footprint
- 80 × 30 cm
- Swimming or living zone
- Bottom
- Flow
- Moderate, with sheltered areas
This is a documented adult size, not a measured average. SL means body length excluding the tail fin. Sex, origin and cultivated form can affect size.
Care guidance; origin and captive breeding can change requirements. Some ranges are deliberately narrower than natural extremes in the source. Adjust water gradually and keep ammonia and nitrite at zero.
Tank sizes are editorial starting points for adults, not guarantees for a complete stocking plan. Group size, tank height, swimming length and territories may require a larger aquarium.
Origin
South America — Trinidad
Habitat & setup
Freshwater bottoms with sand and cover; avoid sharp substrates.
Diet
Dedicated sinking complete food and small frozen foods. Ensure portions reach the bottom.
Behaviour & grouping
At least 6 of the same species; larger groups with enough room.
Living with other animals
Other peaceful fish of suitable size, such as small tetras and calm cory catfish, if water requirements match. Avoid predators.
Possible combinations to investigate further
- Black neon tetra
21–27 °C · pH 6–7.5
Reproduction
Egg-laying; eggs and fry usually need separate rearing.
A suitable cover helps prevent escape and jumping. Protect intakes for small animals. Do not use copper-based fish medication with invertebrates.
Sources & image credits
Data compiled on: 2026-09-27. Species sources support identity and care; group sources give general starting points. Practical recommendations are an editorial synthesis.
Photo: Corydoras_aeneus_2.jpg — . Public domain.
