AquaticRepublic.com - Gastrodermus nijsseni (Callichthyidae) All Fishes

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All Fishes Data Sheet
Scientific Name	**Gastrodermus 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	gas trow derr muss - nih SENN eye
Etymology	Named for Dr Han Nijssen.
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.
Habitat Information
Distribution	South America: Negro River basin. Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there) Login to view the map.
IUCN Red List Category	Not Evaluated
Temperature	22.0-26.0°C or 71.6-78.8°F (Show species within this range)
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 no breeding report.
Further Information
Reference	Practical Fishkeeping, pp 45, Fig.
Registered Keepers	There is no registered keeper.
Wishlists	Love this species? Click the heart to add it to your wish list. There is no wish to keep this species.
Spotters	Spotted this species somewhere? Click the binoculars! There are 5 records of this fish being seen, view them all.
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	LFS label creator ARN ref:1.1.1581.259
Last Update	2025 Jan 02 01:38 (species record created: 2001 Apr 30 00:00)