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Glass Knife Fish (Eigenmannia virescens)
Glass Knife Fish (Eigenmannia virescens)
Glass Knife Fish (Eigenmannia virescens)
Glass Knife Fish (Eigenmannia virescens)

Glass Knife Fish (Eigenmannia virescens)

Glass Knife Fish (Eigenmannia virescens)

$20.00

$12.00

 
 
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The Glass Knifefish, also known as the Green Knifefish, boasts a wide distribution across South America, ranging from the Rio Magdalena drainage in Colombia to the La Plata River basin in Argentina. Its adaptable nature allows it to inhabit diverse biotopes; however, it generally favors deep ponds with plant-rich aquatic substrates. These fish can also be found beneath floating meadow islands in floodplains. This nocturnal species exhibits intriguing behaviors and attributes, including being a micro-predator that feeds on insect larvae and small fish. Possessing a weakly discharging neurogenic electric organ and ampullary electroreceptors, it can sense and emit electrical impulses. These electrosensory systems serve purposes like electro-location, navigation, and communication. These electric capabilities pose no risk to aquarists due to their relatively weak strength.

Characterized by an elongated, semi-transparent body, the Glass Knifefish showcases graceful movements facilitated by its long anal fin. This fin stretches from just below the pectoral fins to the caudal peduncle, allowing it to swim both forwards and backwards with ease. Despite its engaging nature, this fish requires specific care to thrive.

Habitat and Care Requirements:

  • A spacious aquarium (minimum 6 feet long and 2.5 feet wide) is essential for the relatively large male Glass Knifefish.
  • Providing hiding spots such as PVC tubes, rocky caves, stable overhangs, tangles of driftwood, and dried Indian Almond leaves is important.
  • Moderate lighting is preferred, with shaded areas using broad-leaved aquatic plants and floating species to diffuse light.
  • Substrate should be soft sand to prevent fin damage and aid in foraging.
  • Filtration should be efficient, and water movement gentle.
  • Regular small partial water changes are crucial to maintain water quality.
  • They are peaceful and gregarious, so keeping them in groups of 6 or more is recommended.
  • Avoid keeping them with other knifefish species, aggressive species, or potential snacks like small shrimp and snails.
  • Blue moon lighting can be used to observe them under subdued illumination.

Feeding:

  • Glass Knifefish are micro-predators, so offer them a variety of small, meaty foods.
  • Frozen options include bloodworms, mosquito larvae, brine shrimp, and Mysis shrimp.
  • Incorporate slow-sinking granules or pellets for carnivores into their diet.

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