Oscar Vs. Jack Dempsy

Corydora

Medium Fish
Oct 28, 2003
80
0
0
39
IL
#1
I have had both fish an Oscar and a Jack Dempsy. Which I have read are two of the most aggressive Cichlids. I bought them and put them together in a 29 gallon tank with other fish. They were very sweet to each other and when the Oscar died the Jack did not too long after. Is it possible that these fish would always be peaceful together or should I be worried about if I buy more. I bought another Oscar but I'm scared to buy a Jack because the pet stores tell me they will be mean to each other. Does anyone have these two fish together? Are they peaceful with each other?
 

Managuense

Superstar Fish
May 16, 2003
1,204
0
0
43
Springfield, MO
#3
Which I have read are two of the most aggressive Cichlids.
they are indeed large cichlids, but neither is really too aggressive compared to a lot of the other fish out there like managuense, trimacs, devils, convicts, etc.

I bought them and put them together in a 29 gallon tank with other fish
a 29 gallon is not nearly large enough for either one of those fish alone, nonetheless for both of them. a 55 gallon is really needed for either one alone, a 75 or larger for the both of them.

Is it possible that these fish would always be peaceful together or should I be worried about if I buy more. I bought another Oscar but I'm scared to buy a Jack because the pet stores tell me they will be mean to each other. Does anyone have these two fish together? Are they peaceful with each other?
i have kept them together several times and found that jacks are typically a little more aggressive than the oscars, but also do not grow as large.

if the oscar has a little size advantage on the jack they do very well together in a large enough tank IMO.

cichlid aggression is largely dependent on tank size for available territories.....i.e. a jack in a 29 is going to seem much more aggressive than that same jack in a 55 gallon or larger.


HTH
M