National Geographic journeys a thousand feet beneath the sea, to a world hidden from human eyes, to watch the earth's largest predator pursue its prey. Using the most sophisticated "animal camera" yet devised, National Geographic tracks the sperm whale and its prey—the deep-sea squid—on a hunt that takes place so deep beneath the sea that no human has ever seen it before.

Not available for shipment outside of the U.S.

• 1 disc; 50 minutes
• Widescreen
• © 2010