Will a full grown oscar look different than how it looked as a juvinile?
It will look slightly different and will be a LOT Bigger.
but it will look pretty much the same?
Just as people age, your fish's appearance will also show age. I think they get uglier as they get older, but I would not trade my oscars for anything!
one of my oscars is 15" now hes grey with some bright orange scales. when he was little, he was very bright, as he aged he got a bit dull and now that hes almost fully grown his orange is very bright, I'm just waiting to see what happens with my tiger oscars. buy yes I do believe they change a little.