Marine biologist Rick Rosenthal captures on film the billfish, the biggest, fastest, and most dangerous gamefish in the sea. A giant marlin in the wild, provides exceptional footage that will awaken people to the need to preserve these remarkable billfish.

"Polar bears: Photographer Dan Guravich captured these ... images of Polar Bears in over 50 trips to the Arctic. Pandas: Dr. Sue Mainka has worked in China since 1987 to help ensure the survival of the Panda. Grizzlies: The rain forest of British Columbia is one of the last great habitats for the Grizzly and Wayne McCrory is a passionate protector of that habitat.

The Cheetah Orphans: veteran filmmaker Simon King takes on the role of mother to two cheetah cubs, Toki and Sambu. The Desert Lions: Dr. Philip (Flip) Stander, carnivore specialist seeks out the world's most extraordinary population of lions who live in the Namib Desert on Africa's wild and forbidding coast.

Ironically, every dead elephant with its ivory intact is a reason to celebrate. It means an elephant died of natural causes, and a soul was celebrated and mourned by its herd. Award-winning filmmakers Dereck and Beverly Joubert start with the remains of two bull elephants and through a series of key flashbacks, look at the lives they would have led.

A remarkable new story is unfolding in the Arctic. As the ice melts and polar bears struggle to survive, another animal is taking over the polar bear's once dominant role as top predator. An ever-increasing number of killer whales are appearing in Arctic waters. As the polar bear's world is shrinking, the orca's is growing.

Presents a collection of Jack Hanna's ventures into the wild to meet crocodiles, rhinos, giraffes, elephants, hippos, lions, and more.

Renowned nature photographer Joel Sartore takes us on a journey of the world's rarest and most at-risk mammals, fish, amphibians, birds, reptiles and insects.

Eagles dominate the skies. But what makes these predators so special? Researchers put one eagle to the test, and stunning up-close footage reveals her incredible strength, eyesight, and flying skills.

Most wildlife documentaries focus on animal behavior, but Inside Nature's Giants goes inside the largest animals on the planet to explore their anatomy, reveal their intricate inner workings and uncover their evolutionary secrets. In this episode, veterinary scientist Mark Evans and comparative anatomist Joy Reidenberg fly to New Zealand to join a team of experts dissecting a rare specimen of giant squid and a bizarre octopus that inhabits the ocean's...

Explores the behavior of wild animals in their natural habitats.