Big Oscars

We have a two and a half month old Oscar. I can't beleive it's lasted so long. We have the worst luck with Fish. I always find it so strange that there are fish priced at like 500 bucks in some of the pet stores we go into because i'm thinking MAN, what if you buy it and it dies on the way home?! it's insane. Apparently these Oscars get pretty huge..here is a video of how big they get. Currently our Oscar is the size of half a bannana and started out pretty small.