Coldwater Fish

[cgpquinn]

My callico fantail keeps attacking the goldfish and other fantail in the tank. Can anybody tell me why? and is it normal? and what should I do about it? Thanks.

 

[black angel]

Hi and welcome to the forum

First off you need to describe what exactly it is doing, it could be spawning behaviour. If it is aggression then there should be ripped fins and missing scales, and if spawning the male will chase the other fish and bump them from behind and push them around.

 

[cgpquinn]

Hi and welcome to the forum

First off you need to describe what exactly it is doing, it could be spawning behaviour. If it is aggression then there should be ripped fins and missing scales, and if spawning the male will chase the other fish and bump them from behind and push them around.

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Thanks for your help. It is chases them, nips them, bumps them and makes a general nuisance of itself. How long does this behaviour last?

 

[black angel]

Sounds more like breeding behaviour, how big are they? If its a breeding mature male then you will see little bumps on the gill plates and front fins.
If the fish is small then usually its more common to see when the fish are excited, normally at feeding time. How many fish have you got and is it spread out between the fish? I wouldnt do anything to stop it unless the fish being chased is exhausted and then it would be best to remove one of them to a seperate tank for a while.

 

[cgpquinn]

Sounds more like breeding behaviour, how big are they? If its a breeding mature male then you will see little bumps on the gill plates and front fins.
If the fish is small then usually its more common to see when the fish are excited, normally at feeding time. How many fish have you got and is it spread out between the fish? I wouldnt do anything to stop it unless the fish being chased is exhausted and then it would be best to remove one of them to a seperate tank for a while.

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Can't find any bumps, but as it is a callico with black markings that's hardly surprising. I'll see how things go on. I have separated it from the others overnight. If it is a breeding male then it might calm down by the morning. Thanks for your help. Chris.