Hiya,
LOL, I had an Oscar once (a carnivorous fish). I would put guppies or goldfish in the tank to feed it, and they would jump out, rather than get eaten by "Mr Jaws".
But when he got a few, he would try to chew on 3 or 4 at the same time. When he spit out the scales, it looked like a cloud of glitter. All in all, he was a very mean fish, possessed of a bad temper, but he would eat anything you put in the tank (cat food, hot dogs, bugs, etc).
I was living in New Orleans at the time, and on Thursdays it was "Crawfish Boil Night". If you went by in the afternoon, you could get a couple of live ones (before they got boiled). I would drop them in the tank to eat the crud off the bottom.
Turns out, they moult their shells every few weeks. Mr Jaws knew this, and he would wait, and one day I would get up to find nothing but crawfish debris on the bottom of the tank. Oh well, live and learn.
Best,
Nu