Complex sentence: Hubie is picked up by humans and caged on their ship, which is transporting penguins to a zoo and meets a tough, grumpy, streetwise and somewhat arrogant but good-hearted rockhopper penguin named Rocko.
Split into simpler sentences: Hubie is picked up by humans and caged on their ship, which is transporting penguins to a zoo. Hubie meets a tough, grumpy, streetwise and somewhat arrogant but good-hearted rockhopper penguin named Rocko.