
Source: Wikimedia Commons
Hoplisoma duplicareum
A small corydoras with a white body, a black eye mask, a broad dark oblique bar and an intense orange nape patch. It closely resembles Hoplisoma adolfoi but the bar is said to be broader.
Hoplisoma duplicareum is a small callichthyid catfish from the upper Rio Negro basin in Brazil, moved out of Corydoras duplicareus in the 2024 generic revision. FishBase records 4.0cm standard length and Seriously Fish gives 40-50mm. The white body carries a black mask over the eye, a broad dark oblique bar across the back and an intense orange patch on the nape. Among the Rio Negro congeners it is most easily confused with Hoplisoma adolfoi; the bar is said to be broader and the nape patch more intense here, but Seriously Fish states that these characters cannot separate the two reliably. Aquarium conditions are 20-26C, pH 4.0-7.0 and 1-5dGH, so soft, acidic water is needed. It is peaceful and strongly gregarious and should be kept in groups of at least four to six. The IUCN Red List lists it as Data Deficient.
Source: Wikipedia (CC BY-SA 4.0)
The Duplicate Corydoras lives 4-6 years.
The Duplicate Corydoras grows to 4-5cm.
The ideal temperature for the Duplicate Corydoras is 20〜26℃.
Origin
South America (upper Rio Negro basin)
Lifespan
4-6 years
Sources: FishBase / Seriously Fish
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Hoplisoma duplicareum (Sands, 1995)
Synonyms: Corydoras duplicareus
Authority databases: FishBase
Nomenclature follows global taxonomic authority databases.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
4-5cm
Temperature
20〜26℃
Sinking dried foods, frozen bloodworm, Tubifex
Use fine rounded sand with wood and leaf litter for cover, and never block access to the water surface.
20-26C, pH 4.0-7.0, 1-5dGH; soft, acidic water is preferred. FishBase records 22-26C, pH 6.0-8.0 and 2-25dH in the wild.
Peaceful and gregarious; keep at least four to six. Pair it with fishes of similar water requirements, such as soft-water characins.
A foraging omnivore. Offer sinking dried food plus frozen bloodworm and Tubifex. It must never be expected to live on leftovers or to clean the tank.
Use two males per female. Once females are gravid, make a 50-70 percent water change with cooler water and raise oxygenation and flow. Eggs are laid on glass, fine-leaved plants or spawning mops.
Listed as Data Deficient by the IUCN Red List. It closely resembles Hoplisoma adolfoi, so a shop label alone may not identify which species you have.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Duplicate Corydoras is 20〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Duplicate Corydoras is 4-6 years. With proper care and nutrition, they can live a long and healthy life.
Duplicate Corydoras typically reaches 4-5cm as an adult. Size may vary depending on care conditions and individual genetics.
Duplicate Corydoras feeds on: Sinking dried foods, frozen bloodworm, Tubifex. Aim for a balanced diet with appropriate feeding frequency.
The price of Duplicate Corydoras varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 28, 2026