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Narrator: OFF THE COAST OF GUADALUPE ISLAND,
A TEAM OF RESEARCHERS ARE SEARCHING
FOR THE LARGEST GREAT WHITE EVER RECORDED --
"DEEP BLUE."
THAT HAS LED THEM OVER AN EXPANSE KNOWN AS "THE LEDGE."
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Man: Ohh!
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[ INDISTINCT SHOUTING ]
♪♪
Whoo-hoo!
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Man: AH, WHAT A DIVE.
WHEN THAT THING HIT, IT WAS JUST, LIKE, BOOM.
SHARK DOWN THERE MUST HAVE MEASURED
AT LEAST 16, MAYBE 17 FEET.
Narrator: WITH THE CAGE AT THE SURFACE,
THE TEAM ARE EASY TARGETS FOR THE HUGE SHARKS LURKING BELOW.
McMillan: THEY KEEP COMING FROM THE DEEP.
I'D SAY THEY'RE ABOUT PROBABLY 200 FEET DOWN.
Narrator: BUT THE CAGE ISN'T THEIR ONLY TARGET.
THE TEAM WITNESSES ONE GREAT WHITE BITING ANOTHER
IN WHAT APPEARS TO BE A PREDATORY ATTACK.
SCIENTISTS USED TO BELIEVE THAT THIS BEHAVIOR WAS RARE.
BUT A RECENT DISCOVERY HAS LED TO A CUTTING-EDGE THEORY --
GREAT WHITE SHARKS COULD FEED OFF EACH OTHER.
THERE ARE SOME THEORIES THAT WHITE SHARKS ARE CANNIBALISTIC.
THIS HAS TO DO WITH A SHARK THAT WAS TAGGED IN AUSTRALIA.
THIS SHARK HAD BEEN EATEN BY A LARGER SHARK.
Narrator: THE DISAPPEARANCE OF THE NINE-FOOT GREAT WHITE
NAMED "SHARK ALPHA"
HAS FASCINATED RESEARCHERS SINCE 2003.
MONTHS AFTER SCIENTISTS PLACED A TAG ON HER,
THE DEVICE SUDDENLY WASHED UP ON SHORE...
AND THE DATA RECOVERED FROM IT
LED SCIENTISTS TO A STARTLING CONCLUSION.