Amen. Needs to be large as said. Mine eat white shrimp from the seafood department, and fish. Can't get them to eat earthworms. They try to eat pellets, but they can't inhale food like other fish. They just grab it like a gar would. From what I understand, they hide around undercut banks and prey on fish at night. Angelfish make up a substantial portion of their diet. Mine are also gregarious. They really like to be in a group with other Gulper Catfish, or so it seems to me. Good luck.