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Old 01-27-2013, 07:40 AM   #1
eleveniee
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Exclamation why is my fish attacking my other fish?

So I bought a silvery comet goldfish a few months ago, named him Spaz, and put him in my sister's tank, which has a bunch of other fish in it. At the time, she had mollies, platys, guppies and catfish. He started getting a little violent with the other fish just a couple days ago, and he even tried to eat the guppies. He's about three or four inches long now, and I just thought he saw the guppies as food.

My sister finally got him evicted, and I put him in my own tank. I went out and got a friend goldfish, a black moor I named Phillip, and introduced them. Turns out, Spaz is once again being violent, and now Phillip is swimming weirdly, like he's hurt. It looks like some of his scales have been ripped off near his tail, exposing some orange bits. I'm worried about him, and I don't know what to do. Please, I need some help here. What am I supposed to do with them?
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Old 01-27-2013, 08:56 AM   #2
allih
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What size tank do you have? Goldfish get aggressive if they do not have enough space which is about 15 gallons per fish and even more for single tail varieties.
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Old 01-27-2013, 10:08 AM   #3
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They were in a 20 gallon tank together, and I thought that was okay, but... Spaz just went and died. I guess that solves my problem, though I guess I need to figure out how to have this not happen again, right? Kinda sad... Spaz was a good fish.
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Old 01-27-2013, 01:40 PM   #4
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The main thing I would suggest is that you not mix single-tail varieties with fancy goldfish. They are too much faster and they tend to monopolize the food at the least, and attack the slower fancies at the worst.
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Old 01-27-2013, 05:03 PM   #5
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if you really want to discipline your fish, gently trim its tail with cooking scissors. Just keep trimming the tail until it cannot swim as fast. Add some rock salt to a small bowl to dip the trimmed tail before placing back into the community tank.

Walllah!
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Old 01-27-2013, 07:40 PM   #6
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I think it needed more food!
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Old 02-07-2013, 09:48 PM   #7
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Quote:
Originally Posted by harzan View Post
if you really want to discipline your fish, gently trim its tail with cooking scissors. Just keep trimming the tail until it cannot swim as fast. Add some rock salt to a small bowl to dip the trimmed tail before placing back into the community tank.

Walllah!
I find this whole idea very upsetting! Have you done this? How could you bring yourself to do so?!

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