Check your local listings.
The oceans of our planet are ruthless battlefields that constantly test even the deadliest carnivores. Dive beneath the icy waves of Alaska's Aleutian Islands to witness a hunting technique rarely, if ever, documented amongst killer whales. Further south, the fastest fish in the ocean, the sailfish, corrals sardines into a giant bait ball in the Gulf of Mexico. Along the Pacific Coast, the Pacific torpedo ray stuns potential prey with a strong jolt of electricity.