Cat-eLog Right Callichthyidae Right Corydoradinae Right Corydoras (lineage 5)  |  | 

Down Cat-eLog Data Sheet
Scientific Name Corydoras (lineage 5) nijsseni  Sands, 1989
Common Names C111, Nijssen's Cory
Guldhovedpansermalle (Denmark)
Type Locality Tributary of the Rio Negro, Brazil.
Synonym(s) Corydoras elegans nijsseni
Pronunciation kor ee doh rass (lineage five). - nih SENN eye
Etymology Cory = helmet, doras = skin. In this case it was incorrectly used to mean armour (cuirasse) instead of skin in allusion to the dual rows of plates that run along the flanks of this genus. Named for Dr Han Nijssen.
Down Species Information
Size 30mm or 1.2" SL. Find near, nearer or same sized spp.
Identification Like all the other Rio Negro Corys, the black dorsal stripe can vary in size and intensity. Reminds one somewhat of C. elegans in terms of body shape.
Sexing Males are markedly smaller in total length and in body mass. Males also generally have more intense colours with a darker saddle marking. Females can often show smaller fins than males.
Down Habitat Information
Distribution South America: Negro River basin.
Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Temperature 22.0-26.0°C or 71.6-78.8°F (Show species within this range)
Down Husbandry Information
Feeding Will accept most brands of flake and pelleted food of a suitable size, preferably fast sinking. They also relish finely chopped earthworm, whiteworms, grindal and micro worms. Most frozen foods are eagerly accepted. User data.
Furniture Prefers a soft, shallow, sandy bottom with bogwood and plants or rocks. Caves are occasionally used to retire.
Compatibility Very peaceful and active in a community tank.
Suggested Tankmates All smaller community fish. More advanced aquarists will seek this species out for a Rio Negro biotope tank.
Breeding Best attempted in a 5 gallon (imperial) aquarium with bare bottom and a half clay flower pot. Maintain at 24°C. Feed the fish well for a few days on live food and then perform an 80% water change with water at 18°C while also adding vigorous water movement by airstone.

Spawns in typical Corydoras fashion and seems best with one female to two males but a single pair has no problems breeding. Eggs are laid in small clumps of ten or more on the sides of the aquarium, sometimes on the pot and other furniture if used.

Fry hatch in 3 - 4 days and are feeding on live brine shrimp and microworms by day 6 - 7 depending on temperature. The young will attain 2 - 3cm long in 8 - 10 weeks.
Breeding Reports There is but a single breeding report, read it here.
Down Further Information
Reference Practical Fishkeeping, pp 45, Fig.
Registered Keepers There are 21 registered keepers, view all "my cats" data.
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Last Update 2022 Dec 03 05:59 (species record created: 2001 Apr 30 00:00)