What do penguins hide from?

On land they have no predators, but they huddle together in large groups to protect themselves from the weather. In water they are preyed on by seals and other animals. They are particularly vulnerable when they are entering and exiting the water at the beginning and end of their breeding seasons. To increase their individual chances of survival they generally enter the water in large numbers, swimming out to sea in many directions very quickly. When exiting the water they are often at the mercy of strong waves as well as predators and they usually dive quite deep and swim rapidly to the surface and allow their speed to carry them up onto the rocks. They sometimes try to time their jump to make best use of the wave motion.

During breeding season in Antarctica, penguins lack land predators, except that chicks can be taken by other sea birds as food.

At sea, penguins protect themselves from their predators by operating in large groups, as to minimize exposure of all the animals to the danger of becoming part of the food chain.