Nicknamed 'Deep Blue,' this great white is almost as long as the 22-foot-long boat the researchers were aboard near Guadalupe, Mexico, nearly 165 miles away from mainland.
She is one of the biggest great white sharks ever filmed and could be at least fifty years old.
The vertical slashes on her left flank are either from fights with other sharks or mating scars.
With a hugely swollen belly, she is also heavily pregnant and likely to be hungry.
The team, consisting of scientists from Woods Hole's Oceanographic Institute in Woods Hole, Massachusetts, is able to tag Deep Blue. She leads the scientists to the Twin Canyons elephant seal colony.
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