 In the Gulf of Carpentaria, it feeds mainly on halfbeaks, herring, and mullets, and is also a major predator of penaeid prawns.Smaller sharks eat proportionately more cephalopods and crustaceans, switching to fish as they grow older.Many predators feed on the milk shark, including larger sharks such as the blacktip shark ("Carcharhinus limbatus") and Australian blacktip shark ("Carcharhinus tilstoni"), and possibly also marine mammals.