Episode Details

In 1554 French physician Guillaume Rondelet labeled the great white Lamia, after a child-eating monster of Greek myth, centuries before Peter Benchley's 1974 Jaws. The real animal is the sole living species of Carcharodon, a mackerel shark with a strikingly stable genome, reliably measured to about 6 meters and 2,500 kilograms, with females far larger than males. It is partially warm-blooded, warming its brain, eyes, and swimming muscles up to 25 degrees Fahrenheit above the water, and an oily liver of over a quarter of its body weight replaces a swim bladder and stores energy. One tagged shark swam from South Africa to northwestern Australia and back, 20,000 kilometers in under nine months, and California sharks gather at the White Shark Cafe midway to Hawaii.

Hunting is tactical. Off South Africa, sharks rise from about 20 meters to strike Cape fur seals hard enough to breach 3 meters into the air, and they target sea lions behind the torso to avoid their fore flippers. Rather than wrestle a 4,000-pound elephant seal, they bite and wait. Rivals settle disputes over carcasses with tail-slapping splash fights, and persistence can beat size. Pups feed on uterine milk and unfertilized eggs through a 12-month gestation, litters run two to ten, and a 2015 study found males mature at about 26 years and females at 33.

• A 2023 drone video off Carpinteria, California captured a pale newborn white shark shedding an embryonic skin layer.
• Great whites abandoned a major South African aggregation site when liver-hunting orcas moved in.
• A 2023 paper recast bites on surfers as exploratory, and a 2025 drone study saw no aggression during close encounters.
• Mexico banned white shark tourism at Guadalupe Island in 2023 after cage-diving safety violations.
• Critically endangered in the Mediterranean, they have had only four confirmed sightings there in a decade.