PBS Nature - Shark Mountain (2004)

NATURE’s Shark Mountain takes viewers on a dive of a lifetime to reveal underwater creatures unlike anywhere else in the world. Some 300 miles off Costa Rica is Cocos Island, a tiny Pacific outpost that was once a favorite haunt of pirates. Cocos, a designated World Heritage Site, lies directly in the path of powerful ocean currents that often collide with the island, churning the waters into an undersea storm.

These swirling currents carry rich nutrients to a reef teeming with brilliantly colored marine life. Residents include moray eels, hawksbill turtles, leatherbass, bigeye jacks, red-lipped batfish, yellow barberfish, hogfish, and sea urchins, to name only a few. The currents bring more than algae to this island paradise. They also summon an extraordinary abundance of sharks, providing a golden opportunity to observe some of the most surprising and baffling shark behavior ever captured on film. The volume and variety of sharks that visit Cocos on a regular basis is staggering, and includes huge numbers of silkies, hammerheads, black-tip reef sharks, white-tip reef sharks, silver-tip reef sharks, whale sharks, and their distant cousins, the marbled rays.

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