Scientific name:
Gymnorhamphichthys rondoni
Common names:
Mousetail Knife Fish, , Elephantnose Knife Fish
Synonyms: Gymnorhamphichthys rondonis
Order: Gymnotiformes
Size: Up to 6, more commonly reaches 4
Origin: Wild caught specimens only, distributed through Upper and central South America, largest populations in Rio Orinoco
Tank: At least 24 long, about 30 gallons (around 120 liters), be warned that when in large setup, it may only rarely be seen, due to its cryptic nature. Will enjoy a planted setup, needs numerous hiding places
Compatibility: Best kept without any other electric fishes, it refuse to feed if introduced into a tank already containing other electric species, including others of its own species. Keep with peaceful community fish, though even some normally peaceful species (such as silver dollars) may nip at its long, filamentous tail
Water Variety: Fresh (RO water highly recommended)
Hardness: 4-15 dH
pH: 6.0-7.2
Captive Breeding: breeding not reported in captivity
Foods/Feeding: Will accept frozen blood worms, tubifex worms, and black worms, live preferred. Try to station the food under a plant leaf near the fish so that its easier for the fish to locate its meal
More Facts: This species is becoming increasingly rare in the aquarium trade, though it is surprisingly common in its natural habitat of the Amazon and upper South America. In the aquarium, it likes among plats and rocks during the day, and venturing out by night to feed, so feed this beautiful little fish right before heading to bed. Being one of the smallest knife fish species, this species can comfortably be kept in a 30 gallon or larger tank through adulthood. Breeding has not been reported under captive conditions, but one would think that it is possible because of their small maximum size. This delicate species is not a good beginners fish.