Cephalopods are preyed upon by a wide variety of marine animals. Fish such as tuna, swordfish, and sharks hunt them, as do marine mammals like dolphins, seals, and sea lions. Seabirds including albatrosses, gulls, and pelicans also feed on cephalopods, along with reptiles such as turtles and crocodiles. Cetaceans like whales and porpoises, and even other cephalopods such as giant squid and octopuses, are additional predators.
Beyond predation, cephalopods are also susceptible to various parasites and diseases.