Underwater Photographer Unveils 'Secrets Of The Whales'

Different whales around the world have their own distinctive cultures.

Their survival lifestyles are documented in “Secrets of the Whales,” a new National Geographic docuseries by filmmaker and underwater explorer James Cameron.

The documentary plunges into the complex ways that five different types of whales — orcas, narwhals, humpbacks, belugas and sperm whales — communicate and socialize.