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Premium Quality
African Knifefish for Sale



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picture of an African Black Knife Fish at, a Tropical Fish store. Click on the picture to see a bigger picture.  


Pictures: 6" African Knifefish. Click on the picture to see a bigger picture.



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This video shows an African Knifefish, like the ones for sale in our facility. Click here for more about buying an African Knifefish from us.

  Notice the interesting fin-motion along the bottom of this African Knifefish's body. This undulating motion propels Knifefish backwards and forwards.
  Here is an African Knifefish among some plants near the surface of the water.
  This African Knifefish seems to be yawning. You can see that the color of these African Knifefish varies from brown to almost black.
Most types of Knifefish usually hide inside a cave during the day and come out at night to hunt for small fish. The African Knifefish is very hardy and not too aggressive, but will eat fish it can swallow.
Like all Knifefish they have a very interesting method of swimming by undulating the fin across the bottom of their bodies. If you want to try a Knifefish, the African Knifefish is the best type of Knifefish to start with, because they don't get huge like the Clown Knife, and they aren't delicate like the Transparent Knife, or too aggressive like the Carapo Knife. The African Knifefish is a a very good aquarium fish.

Scientific Name
Xenomystus nigri


African Knifefish are very hardy and not as aggressive as most other Knifefish. They are interesting to watch swim. These Knifefish are somewhat nocturnal, so they need a cave or pipe as a home during the day. They are usually active at night, searching for food.

They will often not bother small fish during the day, but then eat them at night. African Knifefish are members of a group of fishes called notopterids. Click here to read a brief article from the Encyclopedia Britannica about this group of fish.

African Black Knife Fish at, Tropical Fish stores, where you can shop online for a Black African Knifefish.   This is an African Knifefish like the African Knifefish for sale in our facility. Click here for more about buying an African Knifefish from us. These are very good aquarium fish.

Appropriate Home
An aquarium with at least 30-gallons of water, an exterior power filter with a BIO-Wheel, a maximum of 1/4-inch of gravel, and an aquarium heater adjusted to between 78 and 82 degrees F. Click here for more about warm water aquariums. Each African Knifefish needs its own cave or piece of plastic pipe as a home. Be sure the rocks or pieces of pipe and everything else you put in your aquarium will not contaminate the water. Click here for more about how to avoid contaminating your aquarium.


Recommended Diet
African Knifefish are predators that eat small live fish, live Ghost Shrimp, and live Black Worms. Click here for more about Black Worms. Click here for more about feeding.


One or several African Knifefish in an aquarium with at least 30-gallons. Elephant Noses, Baby Whales, and Synodontis Catfish are good tank mates. Also kept in aquariums with Clown Loaches, Large Gouramis, Tinfoil Barbs, Giant Danios, and a Plecostomus Catfish. African Knifefish are not compatible with small fish, which a African Knifefish may attack, when the light are off.
Click here to read about several groups of compatible fish.


Size and Lifespan
African Knifefish can grow to 12" but rarely grow bigger than 8" in an aquarium. They can live for 10 years and sometimes longer.

Click here to go to another page in this web site with Customer Comments and our Replies about the African Knifefish.
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This page was updated on November 13, 2015.


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