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Lv 4
Mark asked in PetsFish · 1 decade ago

Why do fish chase each other round the tank ??

I have got a tropical fish tank and have 2 guramies in it they have been in it for 3 weeks , I have just put 2 more in there and one of my current fish is chasing the other fish around the tank and he wont leave it alone , Does any one no why this is and what i can do to stop it ??

28 Answers

  • Anonymous
    1 decade ago
    Favourite answer

    either they want to eat the smaller fish or they're bored.


  • 1 decade ago

    Is it the fish that is doing the chasing the larger?

    If so its prob bullying that can happen when fish are introduced at different times. The fish that has been there longer is trying to show its his territory and he was there first.

    If it doesn't stop soon then the fish being chased will get so stressed he may cause disease in the tank, so you should be prepared to have to remove him.

    When this type of bullying happened in my tank, i removed the victim but the bully fish just chose another target. I would suggest that the bully fish is the problem. Keep an eye on it, i hope it doesn't come to any of the above scenarios. good luck.

  • ?
    Lv 4
    5 years ago

    Is it the fish it is doing the chasing the extra suitable? if so its prob bullying that ought to take place whilst fish are presented at diverse circumstances. The fish that has been there longer is attempting to coach its his territory and he grew to alter into into there first. If it does not supply up rapidly then the fish being chased gets so below stress he might reason ailment indoors the tank, so which you would be arranged to ought to get rid of him. whilst this variety of bullying handed off in my tank, i bumped off the sufferer besides the shown fact that the bully fish certainly chosen yet yet another purpose. i ought to propose that the bully fish is the precedence. save an eye fixed on it, i'm hoping it does not come to any of the above circumstances. stable success.

  • Gouramis are interesting fish, they can be horribly tempermental when mixed with the wrong types, but on the other hand can be a great middle man in a tank of african cichlids.

    The most "common" problem with grouping together gouramis is sexual ratios. If you have 1 male for every 2 females, you'll doubtfully have problems with them so long as they are the same species. Crossing species together, as in keeping 3 orange thick lipped gouramis with 2 3-spot gouramis could easily spell trouble or success... You'd likely need both 3-spots to be female, maybe one could be male without dominating the orange ones... but the males in general are the problem.

    If you group male gouramis together, you get an interesting effect, I call this "Getting all Alpha male on yo ***!". With gouramis they have a tendency to be macho fish, they enjoy impressing the women, and love making the men look weak! They'll chase other male gouramis throughout your tank, isolate them into corners where if they move, they'll be chased right back where they belong... it can be a headache... but I know gouramis are so pretty its just hard to help yourself :D

    So I'd almost lean on that you have all the same types of gouramis (all same species) and that its just a sexual ratio issue as I said... The way to tell them apart unlike other fish is plain and simple... Look at the dorsal fin..

    On female gouramis, the dorsal fin will only be about 1/2 to 2/3 the size of that of a male, it will also be very "rounded" at the end. Compared to the male will have a very dominant and pointy dorsal fin which will clearly be larger than the females.

    I'm sure if you collected your male specimens and decided to keep 1 or 2, the petstore would happilly trade them in for females, they're generally really good like that if you have a good LPS.

    Mixing types of gouramis can spell trouble too, but again can easily be controlled by keeping the amount of males you keep to a minimum. I've seen many odd types of gouramis together from pearl gouramis living with severums (The "hero cichlid"). I've seen 3-spots with golden and orange thick lipped ones, Pink kissing ones with dwarf gouramis etc... Sometimes you wonder how it works out peacefully, but gouramis just seem to be a happy medium and easy to work with..

    Hope they provide you as much enjoyment as my gouramis do... They're wonderful fish :)

    Source(s): Proud owner of Orange thicklipped gouramis and 3-spot "opaline" gouramis. My sister keeps pearl grouamis, 3-spot gouramis, dwarf grouamis, pink kissing gouramis, and golden gouramis... Its a family thing I guess...
  • 1 decade ago

    He's twitterpated (see Bambi)...

    There's not much you can do to stop it. It's either that or a dominance thing. The ones that were there first always claim dominance.

    I have gotten past this by confining the aggressive one. They sell small inserts for aquariums. It's like a tiny little clear plastic tank that fits in your tank. It has holes in it for water circulation with water from the main tank. Check it out.

  • 1 decade ago

    This happens usually with schooling fish because they are playing around and like to stick with each other. There is nothin wrong with this just keep an eye out for missing fins or wounds. If this happens then isolate the attacker and the victim. Treat the victim.

  • Anonymous
    1 decade ago

    Gouramies can be aggressive and territorial towards one another, on a lesser scale from Betta fish (which are related), they will fight until they establish the pecking order. I suggest you avoid putting too many gouramies in one tank. I put three in my 55 gallon and the yellow one with brown stripes constantly harrassed the other two until they eventually died, so I know what I'm talking about. Separate them OR return the aggressive one to the place you bought it.

    Source(s): Fish owner, personal experience
  • 1 decade ago

    They are defending their "territory". Especially against the new fish or other fish that may look like a threat to them. Afterwards, they may turn on the smaller ones as well. Survival of the fittest.

  • 1 decade ago

    maybe they don't like the new ones. Watch to see what happens. Maybe your other fish are aggressive and will need to be separated. Maybe they are just establishing who is the boss of the tank. Watch closely and if it gets worse, separate them. The older ones can kill the newer ones. Fish are that way.

    Source(s): I am a vet tech
  • 1 decade ago

    May be because they are new try sticking them in a seperate net in the tank for a while see what happens.

  • Anonymous
    1 decade ago

    Sometimes you get bullying with fish. If it happens, I get a reasonably large glass bowl, fill it with aquarium water and float it in the corner of the aquarium with the 'bully' fish in it. He can see the other fish but can't get to them. Leave him a couple of days and when you let him out he'll be good as gold. It works a treat.

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