They will eat : Silversides, Krill, Clam, Oysture, Scallop, Squid, Mysis, fish, shrimp (uncooked), snails, Crab, Sea Hair, and just about anythign that isn't fast enough to escape. You should rotate what you feed so it gets a Nutritionally Ballanced diet. Also they should be feed live crabs, and snails on occasion so that they keep their Raptoral appendages in tip top working order. If they don't use them they can atrophy.