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I know a LOT about penguins. Their predators are the leopard seal, killer whale, or even humans who take fish making it harder for them to survive.The skua is also a predator of penguins, especially...
penguins are seals, whales, sharks, giant octopuses and squids, barracudas, giant eels, skuas, petrels, other birds of the air, domestic dogs and cats, pigs, bats, wolves, some big cats, ferrets and...
Most seals eat penguins and enjoy them very much, when the penguins go into the sea to catch fish the seals hide and watches the penguin it watches then it catches it and eats it.