Glass Knifefish (Eigenmannia virescens)


The Glass Knifefish is one of many similar-looking species in the genus Eigenmannia native to the Orinoco and Rio Meta drainage in Colombia and Venezuela. Named for its partially transparent appearance, the Glass Knifefish is a fascinating aquarium resident which tends to be less shy than some of the more well known knifefish species. It is also typically found in large aggregations in the wild and will do best when kept in groups in the aquarium so long as there is ample space and hides in the form of driftwood or caves. Although it is a peaceful species and compatible with most tankmates, they are slow and sometimes finicky eaters so fast-moving or aggressive feeding species should not be kept with these unique fish.


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Glass Knifefish (Eigenmannia virescens)

Origin: Wild Colombia
Locale: Rio Meta basin
Diet: Small invertebrates. Can be weaned onto frozen foods in the aquarium.
Adult Size: 8″
Recommended Tank Size: 50 gallon+
Compatibility: Peaceful towards most tankmates
Preferred Water Parameters
pH:                          6.2 – 7.2
Temp:                     76-82F
Ammonia:              0ppm
Nitrite:                    0ppm
Nitrate:                  <30ppm