Animal Stories - People Talking About Knifefish


Animal-World info on Zebra Knifefish
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Anonymous - 2008-10-07
If I put a african brown knife with a electric yellow cichlid, will the knifefish destroy it?

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  • Ryno - 2010-02-28
    These fish are not compatible. If the Knife can fit the Cichlid in his/her mouth he/she will eat the Cichlid. If the Cichlid is bigger than this it will likely torture and skin the Knife.
  • Fishman - 2010-03-26
    You have it backwards the knife is not an aggressive species it is predatory however cichlids are extremely territorial and just all around mean in my opinion most cichlids should only be kept with other cichlid species the exception to this are rams and dwarf cichlids.
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Animal-World info on Clown Knifefish
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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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Animal-World info on Black Ghost Knife Fish
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Sophie - 2010-02-12
Hi, I've just bought a 4inch knife fish, it's in my 190lt tank. He's with a clown loach, yoyo, pleco, cardinal tetras, harlaquins, and minnows. Was it a bad idear everyone seems fine at the momment. Please messege me sophie=price at symbol msn . com many thanks

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Taryn - 2010-02-07
Hi, Well I have two black ghost knife fish at the moment. I must say they are awesome and very amusing to watch. My first BGK fish is about 9 inches, I bought him when he was just over 2 inches about 9 months ago. He lives in a 42 gallon tank with lots of plants and drift wood, eventually will be moving him to a 6ft tank, but for now he lives with a bunch of kuhli loaches, a pleco, a whiptail and a whole lot of cherry shrimp, all of which he leaves alone. He loves bloodworms and all other live/frozen food which I give as a treat, but he mainly eats sinking carnivore pellets. He will come out at any time during the day or night. My second BGK fish is currently living in my discus tank, she is only 3 inches and eats anything mainly carnivore sinking tablets and flake food. She is living with 3 breeding discus pairs and always leaves the eggs alone. She mainly comes out at night as she is only new. I've had her for maybe 2 months now, but she is getting more adventurous. She will also move to another tank in the future. In conclusion the Black ghost knife fish are awesome fish to keep. They are the first fish I have had. So as long as your willing to do the research I do not think experience plays a big roll in keeping them.

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J - 2010-02-01
Kyle, Plecos and bottom feeders are included in that... they are bottom feeders and they count as fish. Yeah, it is over crowded with a freaking 10" pleco.

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Z. - 2010-01-19
Kyle, your 44 is overcrowded. The 1" per gallon rule doesn't hold true when dealing with large fish - it simply doesn't account for the amount of waste produced.

I agree with Koop. Rehome some of your fish.

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Animal-World info on Zebra Knifefish
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Chris Durgin - 2010-01-18
I was wondering where I could buy one of the Zebra Knifefish at, because I really want one. Any tips on where I could buy one, they seem small enough to put in a 55 gallon. I want to see him grow into the tank and again if you know where I could at least order one online or anything let me know.

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  • Todd Appel - 2010-04-11
    There's a curent auction listing for them on aquabid.com
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Animal-World info on Black Ghost Knife Fish
Animal Story on Black Ghost Knife Fish
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Tommie - 2009-12-29
I have a 29 gallon tank with quite an assortment of fish ranging from bettas, sharks, dragon fish, and one ghost knife I call my queen. She is beautiful and seems quite content. although she stays hidden during the day she comes out at night and eats from our hands. She is definitely my favorite!

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kyle - 2009-12-27
My 44 gallon tank is not overcrowded. Firstly most knifefishes never grow 20 inches in aquariums, that twenty inches is based on a wild caught specimen out of the spacious amazon river. Secondly, have you heard of the inch per gallon rule. Every inch of fish needs a gallon of water. Tiger barbs and flying foxes grow three inches long; 6 total, times 3 inches equals 18 inches and a required 18 gallons of water. The 18 inches of the barbs and flying foxes and the 12 inches of firemouths and the 5" knifefish puts me not only under the limit according to the inch per gallon rule; but allows the knifefish to grow to a length of 14" long. Thirdly, knifefish are one of the slowest growing species of freshwater fish in the world. It will take years for my knifefish to even reach 14" in length. By the time he reaches 14", almost everything else in my tank will be dead. That's how long it takes knifefish to grow. I bought mine over two years ago when he was just under three inches long. That is an inch per year growth rate. And when he does get long enough, I have a 200 gallon tank with oscars he can move into. I am just growing him out in my more peaceful tank until he is big enough to live with some oscars with out getting eaten. Lastly, bottom feeders like plecos don't count towards the space required for the tank. Check your facts before criticizing someone who has 25 years of experience with fish.

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