But during two recent expeditions they captured wildly spectacular scenes that may never have been photographed: that of a voracious cape fur seal boldly snacking on large sharks; and dozens of blue sharks gathered around and gorging on an enormous ball of bait fish.
"In more than 2,000 expeditions working with sharks over the last 21 years, this is the only time I have ever seen a seal kill several sharks and I can find no record of such an event happening elsewhere."
The seal consumed the stomach and livers of the first two sharks, before killing three others.
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