Skuas definitely are enemies of penguins. Skuas will eat penguin chicks and eggs which are not being guarded by an adult penguin, but they will not attack an adult penguin unless it is too weak to defend itself.
The young of emperor penguins are eaten by giant petrels or skuas. In the water emperor penguins are eaten by leopard seals and killer whales.
Skuas, leopard seals, and Killer whales
emperor penguin chicks are eaten by skuas, giant petrals, or seagulls, the adults have enemies in orcas and leopard seals
Skuas eat baby Emperor penguins.
sea lions, skuas, and seals, and orcas.
sea lions, skuas, and seals, and orcas.
Skuas and Giant Petrels
Skua eat baby penguins when left unprotected. -babyboo
The emperor penguins are prey to seabirds like giant petrels and skuas. They are also eaten by leopard seals and killer whales.
Seals are penguins enemies.
Seals.
The fox will raid dens and eat young. In southern Australia, where the Little Penguin colonies are, dogs (both domestic and wild) and feral cats are a major threat to the nesting penguins. Dogs have been known to get into the protective enclosures and kill off large numbers of these penguins indiscriminately. Out at sea, predatory skuas have been known to attack penguins, while sea eagles also prey on them. Leopard seals, sea lions, walruses and orcas are also enemies of penguins.