By dodging really quickly.
Unknown
Leopard Seals and Orcas, I believe.
sharks, crocodiles and other penguins
Seals and killer whales (orcas).
Leopard seals and killer whales
Leopard seals and killer whales
by digging into ice and diving into the water
I think the tooth whale is but not the penguin
Emperor Penguin's use their grace, speed, and agility underwater to out swim most marine predators such as Leopard Seal's. For land... they aren't the best at getting away. Most penguin's are only really made for the sea.
No penguin 'lives' in a nest -- some penguin eggs are hatched in nests where there are no predators, but eggs can be moved by the adults to preserve them until they are ready to hatch.
Emperor penguins defend themselves by huddling together in groups to keep warm and protect against predators. They also use swimming speed and agility to evade threats in the water, and can vocalize to warn off potential predators.
Emperor penguins live in Antarctica and the surrounding sea. They find their food in the ocean, fish. They avoid predators such as the big walrus type things.