Explore the fascinating and extraordinary behavior of creatures deep within their undersea world. This stunning new series presents never-before-seen behaviors of sharks, whales, dolphins and many other unusual marine animals. Dive into the submarine forests of giant kelp in the Northeastern Pacific. Examine the complex behaviors marine creatures employ to spawn, escape predators and survive. Witness bizarre defense and predation strategies including camouflage and deadly venom, then enter a waterworld of darkness where nocturnal swimmers rise from a black abyss or emerge from undersea caves in the never-ending struggle to capture prey and survive. Includes: "Cathedral in the Sea," "Survival in the Sea," "Venom," "Creatures of Darkness," "The Great Whales," "Sharks," "City in the Sea," "Star Gardens," "Mountain in the Sea," and "Filming Secrets."