Tetraodontiform, Feeding habits
As one would suspect from their usually well-developed and massive dentition, often with the teeth fused together in a parrotlike beak, most tetraodontiforms feed on hard-shelled crustaceans, mollusks, and echinoderms. But some, with massive, crushing jaws and teeth, such as the ocean sunfishes, often feed extensively on such soft-bodied invertebrates as jellyfishes
