Back when I had one I fed it small lizards (anoles, and swifts), pinkies, frogs, even a small 4" garter snake I found in my backyard (I wouldn't have fed it to my fish but my dog almost killed it, and at first I tried to save it. When I realized I couldn't I decided to let the fish have it.). Honestly though the biggest things I fed it were either the frogs or shrimp (not alive). For the most part I just fed him pellets, crickets, worms (red, meal, wax, & nightcrawler) and shrimp with the occasional big item or feeder fish as a treat.