|Cat-eLog Data Sheet|
|Scientific Name||Corydoras nijsseni Sands, 1989|
|Common Name(s)||C111, Nijssen's Cory, Nijssen's Corydoras|
|Type Locality||Trib. of the Rio Negro, Brazil.|
|Synonym(s)||Corydoras elegans nijsseni|
|Pronunciation||Kory DOOR ass - 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.|
|Size||50mm (2") SL. Find near, nearer or same sized spp.|
|Identification||Corydoras are identified by their twin rows of armour plates along the flanks and by having fewer than 10 dorsal fin rays. They are most commonly confused with the other genera in the sub-family, namely Brochis, Scleromystax and Aspidoras.
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.|
|Distribution||South America: Brazil: Rio Negro
Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there) (Click the map-icon to show/hide map of species distribution)
|Temperature||22.0-26.0°C or 71.6-78.8°F (Show others within this range)|
|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.|
|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.
|Registered Keepers||(1) mummymonkey (k: 3), (2) Jools, (3) hoplo (k: 3), (4) Cornuta, (5) corybreed, (6) boyneburn, (7) mace.
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|Last Update||2007 May 03 21:07 (species record created: 2001 Apr 30 00:00)|
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