Returning to the subject of the Jack Dempsey and the Oscar fish JD s tend to be more retiring in general so you can expect to see a great deal more of the Oscar than you do of the JD. Now depending on size and temperament a JD may try to bully an Oscar. Is it a cycled tank

This is entirely normal behavior and it is not a result of the oscar scaring the jd .

Oscar fish Jack dempsey vs oscar fish. If it is then you don t need to do so many water changes. If it s not cycled then certainly regular water changes would be good. Oscar vs jack dempsey-normally the jd gets the best of oscar but this time oscar seems to have the advantage.they fight every week or two and then the oth The jack s do have a unique personallity no doubt but not quite as much as the oscar. I found my jack was a little more timid than the oscar. The oscar definately had the personallity of the two.

I found in my case they were a good match with each other. The jack dempsey fish is not an easy fish to keep in your tank. That is because they can get aggressive towards other fish and they might get territorial too. But this doesn t mean that they cannot coexist with other tank species like the oscar fish but it simply means that they should be kept by experienced tank keepers and people who know Hello i was curious to know a bit more about oscar and jack dempsey aquariums. I have been doing bits of research into this and found that on some other forums and in some books people hint at the two species being perfect tank mates for each other. Prized for its iridescent spots the jack dempsey cichlid has a sturdy build and no-nonsense attitude that inspired its name commemorating the former heavyweight boxing champion.

While male and female jack dempseys look similar as juveniles and adults they are easy to tell apart visually by the time they are a year old.

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