Will an Oscar get more aggressive as it ages?

[Ihsnshaik]

when I read this I pictured a dovi with a monocle and a top hat. haha. but yea thanks for the replies folks. fingers crossed he/she will stay chill. I got it at about 3" and its been in a tank on its own at my place for about a month, so this is his first test run with buddies. there's been more aggression from the uaru towards him than him to anyone else, except a lone diamond tetra that was left in that tank who is lucky that he is nimble

Thats funny I imagined the same thing like Mr.Peanut lol

 

[Rocksor]

fingers crossed he/she will stay chill. I got it at about 3" and its been in a tank on its own at my place for about a month, so this is his first test run with buddies. there's been more aggression from the uaru towards him than him to anyone else, except a lone diamond tetra that was left in that tank who is lucky that he is nimble

As it gets bigger, the WC oscar that you have will start to get more aggressive to that Uaru who is picking on him.

 

[jamntoast]

As it gets bigger, the WC oscar that you have will start to get more aggressive to that Uaru who is picking on him.

good. its the pair that pick on everyone. couple of jerks. hah

 

[jwh]

I've got a wc Oscar who is ~4.5" maybe more and I just moved it in with a group of geo tapajos and uaru amph Who are all pretty much maxed out for size so I'm not too concerned at the moment but can I expect that as he gets older and larger it will become more aggressive? I've never kept astronotus before but you always hear about each fish having its own temperament, and it's pretty chill for now, kinda hoping he stays that way.

True about fish having their own temperament, I have found that oscars often are undeservedly labeled as aggressive, in a few instances I have seen them become unhinged when approaching the 12" mark, so keep an eye and hope for the best, be prepared to split & rehome if it becomes necessary.

 

[pops]

Oscars will get into juvenile stage, around 7 months, this when they start tearing up plants, attacking rocks, and just plain trying to own the place, if other fish in the tank, they will try to own them to, but Oscars are like a bully in the play ground, once owned by a fish, they owned for life in the tank.

 

[jamntoast]

Oscars will get into juvenile stage, around 7 months, this when they start tearing up plants, attacking rocks, and just plain trying to own the place, if other fish in the tank, they will try to own them to, but Oscars are like a bully in the play ground, once owned by a fish, they owned for life in the tank.

so are you saying that it would be a good thing if they try to be tough with the uaru or whoever early on and get tuned up?

 

[pops]

I am saying as big as Oscars get per say. they are easily owned by other fish.
After that you have a timid stressed oscar.

 

[jamntoast]

ah gotcha.

 

[duanes]

I have never founds oscars to be particularly an aggressive species, especially when compared to many Central American's.
Sure they will gladly slurp down anything that fits in the mouth, but to me that's not aggression.

 

[jamntoast]

I have never founds oscars to be particularly an aggressive species, especially when compared to many Central American's.
Sure they will gladly slurp down anything that fits in the mouth, but to me that's not aggression.

yea I've noticed this already when it tried to eat the diamond tetra which looked to me that it was too big for the Oscars mouth. totally shows the evolutionary relationship between these two species. immediately went after it. cool stuff. but yea so far no aggression, and it wasn't pouting or anything after being moved into the new tank, so I don't think its nervous or anything.