When I was a kid, my folks kept 3-4 Oscars in a 100G tank. It was always fun going to the tropical fish store to buy goldfish. We didn't get them to keep, we got them as food for the Oscars. They would eat until they couldn't swallow any more, and they'd swim around for hours with half a goldfish hanging out of their mouths. Man... I thought feeding three kids was expensive? I'd hate to have to feed ONE Oscar!!! LOL!