The Shark Collection

See the world's first MRI scan of a great white shark as Ultimate Shark reveals the extreme engineering and predatory abilities of one of nature's most near perfect predators. Hear firsthand accounts of people who survived harrowing encounters, including a surfer who was bitten on the arm and leg, towed by the surfboard ankle strap and miraculously escaped only with minor injuries. National Geographic demystifies the true motives and power behind their behavior.

Hammerheads school in enormous numbers. Coral reefs ripple with color by day but at night turn into killing grounds for packs of whitetip sharks. Pristine waters brim with tuna and dolphins in hot pursuit of clouds of fish. Isla del Coco, or Cocos Island, appears as a tiny dot on a map in the Pacific Ocean more than 300 miles off the coast of Costa Rica, and is home to one of the greatest concentrations of predators on the planet. Dive into this carnivorous crowd in Shark Island with marine ecologist Enric Sala and an international team of explorers and scientists. The team traverses hundreds of square miles of ocean in search of clues to explain why so many predators congregate here and why, just outside Cocos' protected waters, life largely disappears.

Hidden beneath the surface of the sea is a phenomenon we know almost nothing about. On land, scientists have long studied the great animal migrations, but in the ocean some of the most spectacular events go almost unnoticed. Now, with an international team of scientists, National Geographic examines the movements of hammerhead sharks. How do they navigate? Do they possess an internal compass? What prompts them to seek out distant destinations? In a world threatened by overfishing and declining marine populations, understanding their behavior may be the key to ensuring hammerhead survival.

Reptile expert Brady Barr plunges to frigid ocean depths to get close up to one of the world's most mysterious, deep-sea sharks—the giant sixgill shark. These prehistoric creatures have remained elusive despite their size, but while filming some of the largest congregations of sharks ever seen, Barr and his team make an amazing observation and capture unique shark behavior on film.