Great white sharks have long been sold as the ocean’s final boss. A perfect predator, slick with cartilage, terrifying rows of jagged teeth, and hovering at the top of the food chain. But off the coast of South Africa, even they’ve been forced to retreat. All because two very determined orcas seem to have a taste for shark liver.

For years, Gansbaai drew tourists hoping to cage-dive among great whites. That changed in 2017, when the sharks started disappearing. Early theories blamed the usual suspects—warming seas, dwindling fish stocks—until the evidence arrived on shore. Great whites were washing up with surgical-looking wounds, their livers and hearts torn out. The killers were identified as two orcas, nicknamed Port and Starboard.

Marine biologist Alison Towner has spent years tracki

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