The flap opens to breath when above the water. Food Dolphins are carnivors, or meat eaters. A lot of dolphins eat mainly fish and arrow cuttle-fish. Other dolphins, like the orca, hunt and kill seals, walruses, and even other dolphins. They all swallow their prey entirely or in big pieces.
Sharks are dangerous enemies for a dolphin.
Mankind may be the biggest enemy of the dolphin. In some coutries, dolphins are caught or killed for food. Pollution is another threat caused by man. Poisenous chemicals which pollute the oceans or seas may infect the fish which serve as food for the dolphins. Scientific research has proven that these chemicals also have affected the health of dolphins and developed tumors.