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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charlie - 2010-12-12
I have a clown knife that i have had for about 3 weeks, he stays on the top of the tank, wont hide, i have noticed that he has knots on his side. he seems to be eating very well, moving around like nothing is wrong. Has anyone ever had this problem?

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  • brandon - 2011-01-01
    I have had seen this many times. It almost sounds as tho it may be a birth defect with concerning the knots. I have owned many of these fish and for the first couple of months they sat at the top of the water and did nothing. I kinda assumed that my tank wasn't suited for them so I bought a few cave/ rock like structures and now they like to hide in those, and swim around a lot more. When I turn my tank lights on the morning they usually are found out scavenging which is probably due to the fact they're nocturnal. But my advice to you is to simply give it some stuff to hide in and it should be fine.
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Jay - 2010-12-29
My 7" clown knife is having fin rot and looks bent out of shape. Any tips for treatment will be greatly appreciated.

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jesse - 2009-07-20
I would like to find a clown knifefish but I don't know if he will do well in a 55 gallon tank.

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  • dennis - 2010-02-26
    A 55 gal tank is ok for a clown knife they will grow to the tank size. I had 1 for 5 years and it got 26' long in a 80 gal tank but they do eat alot.
  • JT - 2010-04-24
    There is no such thing as a fish that "grows to the tank size", their growth may slow down considerably, but this is because they are being stunted which will eventually lead to their death. You need at the very least a standard 180 gallon, but even that would eventually be too small, and could cause them to become slightly deformed. To properly house a clown knife for life, you will need a 240-300 gallon tank.
  • Breanne - 2010-12-12
    Hi. I currently have a 16" clown knife in a 46 gal bowfront tank. He is doing wonderful but he eats about 40 large goldfish a week. He is only about 7 months old now. Make sure if you have other fish in the tank that they are large also. He will try to eat anything that fits in his mouth.
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Lorenzo - 2010-10-30
Hello, I am currently going to get a clown knife fish from my uncle(he is a breeder of this fish). I want to know if I can keep him in a 45-gallon tank-no company, just him/her and a filter/pump and of course, water. Is it also OK if I dont put any pebbles OR a small cave since I heard that they need a hiding spot since they are nocturnal. However, my uncle keeps his clown knife fishes in one of those tiled ponds in pet stores(you know, the ones that usually keeps kois or carps) and I do not see any hides. I just wanted to know.Thanks.

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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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