Dwarf_Dude, a Oscar will out grow a Jewel very fast. He is talking about getting them both at a small size, Jewels grow fast, but not as fast as what a Oscar can/will. Jewels are not agressive in a tank that is large enough, as for any cichlid for that matter besides the beani. If the tank is big say 100g+ I can bet the fish will get along. My father has a friend on WW has a 400g tank with a Dovii in it, and it gets along with every fish, but if that Dovii was in a 180g it would kill every single tank mate. IMO get a fish that a Oscar will get along with really good, like a Severum or somthing.