Rattail Knifefish
NameRattail Knifefish
Scientific NameApteronotus leptorhynchus
Common NamesRattail Knifefish, Brown Knifefish, Long-nosed Knifefish
FamilyApteronotidae
OriginSouth America, Amazon Basin, Orinoco Basin
Temperamentsemi-aggressive
Dietcarnivore
Care Levelintermediate
Minimum Tank Size (Gallons)75
Max Size (Inches)16
Water TypeFreshwater
Temperature Range (°F)72-82
pH Range6.0-7.5
Compatible SpeciesLarger Tetras, Angelfish, Discus, Larger Catfish, Gouramis, Rainbowfish
Description
The Rattail Knifefish is a nocturnal, elongated freshwater fish native to South America. It uses weak electrical fields for navigation and communication in its natural habitat. This species is known for its long, tapering body and shy, predatory nature.
