Just what do dolphins eat? In the Army you are told, “If it moves, salute it, it doesn’t move, paint it”. Applied to the dolphin, the saying might be “If it swims, eat it”. That’s not to say the dolphin will eat anything, and since it swallows its food whole, certainly not anything too large. It will also eat some things which don’t spend much time, if any time, swimming, such as crabs, mollusks, and other shell fish.