Animal Stories - Clown Knifefish


Animal-World Information about: Clown Knifefish

The beautiful Clown Knifefish is probably aquarist's most favored species of knifefish!
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David - 2010-05-22
Can I keep a clown knife in a 20 gallon tank with 3 Black Ghost Knifes, 2 Butterflyfish, 4 Elephantnose, 1 Bichir, and 1 Red-tailed Shark? I also have three apple snails. Would the Clown Knifefish damage my Amazon sword plants or my water lilies?

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  • Daniel - 2010-06-29
    Dude No way, that's already waaay too many fish for a 20 gallon tank. Get a 125 at least if your bgk and nosers are getting along.
  • Anonymous - 2010-10-13
    Yes they will get along but you have too many fish in that tank, you might want to upgrade soon.
  • Warren - 2010-10-15
    You can keep a clown knife with your fish in a 20 gallon temporarily. A clown knife is a large growing fish and would out grow a 20 gallon and your other fish.
  • Shaun - 2010-10-18
    No i would not keep this fish in anything smaller than 125g+. It will be a 20+ inch monster. I would also not get the ghost knifes as they will get 20+.
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Tan Hui Chun - 2010-09-17
Can clown knife fish mix with spotted gar or alligator gar? why the clown knife fish fin (below one) become white color?

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Tan Hui Chun - 2010-08-31
Can I know how to measure the size of my clown knife fish? Need to take it out of water and measure?

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Audrey - 2010-08-16
I currently own one Clown Knifefish. I got him when he was 3 1/2 inches and in 2 months he had grown to about 6! He is the shyest knife out of the 3 we own, & tends to let them pick on him time to time, even if they're a lot smaller. He is a hardy fish who loves to hide in his hut. He likes hand feeding frozen silver sides, black worms, and also likes hunting minnows. He's growing fast in our 75 gallon. Such a wonderful fish.

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David - 2010-05-24
Actually, make that two butterflyfish, one black ghost knife, four angelfish, four Black Skirt Tetras, and one Red-tailed Shark. I still have three apple snails and the Amazon sword/water lily plants.

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patoscar - 2010-05-12
Help I am starting on big aquariums can I keep 1 oscar a 1 clown or ghost knife fish, 4 silver dollars, 1 ornate birchir in a 55 gallon tank please need advice from someone who knows best thanks?

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Bethanie - 2010-02-24
We have two clown knives, one has definitely out grown the other, and based on the behavior they have been exhibiting we believe that they might be mating. They are currently being kept in a 150 gallon with two plecos, a cat fish, and three medium sized oscars. We really don't know a whole lot about their breeding habits and internet research has gotten us nowhere. While we do believe they might be breeding, we are also afraid that they might be fighting over territory. Could anyone give us some insight on breeding and if they are, how can we help the fry to survive? Thanks in advance!

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Kevin - 2009-08-29
I have had my knife for a little over 2 years now he is a great fish.I currently have him in a 125 gal tank but soon to be 180. If you are thinking about getting a knife say goodbye to anything small in your tank and try feeding him dryed shrip or any dry brine.That way he doesnt get used to eating live fish. If you keep contact with your tank often he will actually become very friendly as he will eat ot of your hand and sometimes swim throgh your hand when feeding. Very amazing fish and once they grown past 6 to 7 inches very easy to take care of! Feel free to email me with any questions kevinkapanka2003@yahoo.com

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  • Brody Avalon - 2010-02-24
    Hmm...I have had mine for 15 years and he is about 20 inches long. I would caution handlers from feeding them unless you have quick fingers. He doesn't break the skin but it is painful when they bite :-)
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xtasy - 2009-07-23
If you want to get a clown knife it will be fine in a 55 gallon aquarium for awhile. Until about 1 1/2 years when it gets over like 16inches long. But I have 1 in my 55 gallon and it is very happy with no space problems. Hope this helps. :)

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Theresa - 2009-05-26
I purchased my clown knife (named "Buck") about four months ago. He was only about 3 1/2 inches long at that time. He is now 12 inches long. He is very friendly. Comes to the top of the tank when I approach as if he knows he's getting fed. He is in a 125 gallon tank along with a Shovel nosed Catfish, 3ea. 4-6" discus Fish, a 5" silver arowana and 4ea. 5-7" plecos. They all get along beautifully. This is just one of six tanks that I have in my home.

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