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Zebra Knifefish

Family: Gymnotidae

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Gymnotus pedanopterus Photo © Animal-World: Courtesy Childs

   True to its name this striking fish, the Zebra Knifefish, shows a 'zebra' type patterning along the total length of it's body!

   The Zebra Knifefish is an incredibly beautiful species of knifefish but unfortunately, for now, it is considered to be very rare. A more recently described fish (1994), not much is known about this striking species. The few that have been imported seemed to be hardy and easy to keep. The behavior of their close relative, Gymnotus carapo, is that of a very aggressive fish so this species will probably be best kept singly.

For more Information on keeping freshwater fish see:
Guide to a Happy, Healthy Freshwater Aquarium

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Distribution:
   The Zebra Knifefish was described by Mago-Leccia in 1994. The are found in South America: Southern part of Venezuela, including Territorio Amazonas and south of Estado Apure; also known from tributaries of Rio Negro in Brazil. They have supposedly been found in parts of Peru but these reports are unconfirmed.

Status:
   The species is not listed on the IUCN Red List.

Description:
   The body of the Zebra Knifefish is somewhat more rounded than flat. It has no dorsal fin but does have an extremely long anal fin starting near the pectoral fin area. This fin can move in an undulating forward or backward motion. The color pattern is 'zebra' like with dark and light clean edged bands extending along the entire length of the body.
   This fish also has an electric organ which allows it to generate a very weak electric field around its body. The field helps with a variety of things such as identifying objects in the water, gives it spatial orientation, helps it to navigate, and helps it identify food. Males use an electric 'stereotyped' communication to court females.

Size - Weight:
   11 inches (28cm) is the accepted maximum size.

Care and feeding:
   The Zebra Knifefish are carnivores. Other Carapo species like to eat small fish and meaty fresh or frozen foods and this species probably has similar tastes. They are sensitive to some fish medications such as copper and those containing formalin.

Water Region: Top, Middle, Bottom:
   This species will most likely spend most of its time on or near to bottom.

Acceptable Water Conditions:
   Temp: 72° - 82° F (22 - 28°C)

Social Behaviors:
  The behavior of the Zebra Knifefish is unknown but if they are anything like their close relative, Gymnotus carapo, they should be considered to be very aggressive. If you are lucky enough to be able to find and afford one of these rare beauties, it is suggested that you keep it by itself.

Sexual Differences:
   Sexual differences are unknown.

Breeding/Reproduction:
   It has not been bred in captivity.

Availability:
   The Zebra Knifefish is very rare.

Author: Ken Childs

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