Oscars occur in almost every country on the S. Am. continent.
Redtailfool is right-those are wild collected fish. You can take a look at various wild oscars I've imported and photographed here in my photo gallery Tangled Up In Cichlids photo gallery
Yup!! Love those guys! Rapps here is about the only person I know of that gets them, known as Bumble Bee oscars....come from Sao Paulo (sp)...just about the only oscar that I am interested in buying...hasn't gotten in any for a while though...but patience shall pay off!