I have a 10" tiger oscar, a 5" texas cichlid, and a 10" florida gar in a 180 gal. I wouldn't even try to sex the oscar or gar, but the Texas does appear to be a male.
The oscar and gar have been in there together for some time (used to have a mono pbass in there, rehomed him). They don't really pay much attention to each other, never have. I introduced the texas about 3 months ago, and until the last 36 hours or so there was a clear pecking order and everyone was pretty calm.
Now, the texas (who has really bulked up in the last month or so) seems to have developed an attitude. Even though he is much smaller, he seems to be the aggressor (not surprising considering the species i guess). The gar is not involved, just a lot of chasing and jaw locking going on between the texas and the oscar. I've been trying to break them up before they inflict any real damage by scattering a few pellets around the tank to distract them.
I have thought about possibly turning down the water temp a few degrees (tank is running at 77), maybe that would calm them down a bit? I'm a little flustered, i thought 180 gal was going to be plenty for these 3 fish.
The oscar and gar have been in there together for some time (used to have a mono pbass in there, rehomed him). They don't really pay much attention to each other, never have. I introduced the texas about 3 months ago, and until the last 36 hours or so there was a clear pecking order and everyone was pretty calm.
Now, the texas (who has really bulked up in the last month or so) seems to have developed an attitude. Even though he is much smaller, he seems to be the aggressor (not surprising considering the species i guess). The gar is not involved, just a lot of chasing and jaw locking going on between the texas and the oscar. I've been trying to break them up before they inflict any real damage by scattering a few pellets around the tank to distract them.
I have thought about possibly turning down the water temp a few degrees (tank is running at 77), maybe that would calm them down a bit? I'm a little flustered, i thought 180 gal was going to be plenty for these 3 fish.