Some mentions of penguins mating, but nothing graphic.

We see a partial shot of a male penguin mounting a female one from behind for mating purposes, but no actual copulation is seen.

A sea lion attacks and swims away with a penguin carcass in his mouth.

A penguin egg is viewed as it is destroyed by the cold, and slowly cracks.

A few mentions of penguins not surviving.

A predator chases some of the chicks but no injuries are seen.

We see some frozen penguin carcasses during a bad storm (beyond being dead and frozen, there's no blood or gore).

None.

None.

The scenes of death and danger may be intense for some viewers.

We see a lone penguin trying to make it to the breeding ground, but hear the narrator say that its hope for survival is remote (that might be troubling to younger kids, although we don't see any death or frozen body).

Some sad scenes such as a newborn penguin chick dying.