I once had a small bass and a crawdad in a 75 gallon aquarium. The bass ate everyting. When I tried to feed the crawdad some lunch meat, the bass would eat it before it sank. He would eat canned corn, canned peas, bread, lettuce, and anything else that I was eating at the time. At three inches long he would eat several gambusia at a time and they would swim out of his mouth too. I released him pretty small because he ate more than I could find time to feed him.