Killer Whales Surround a Polar Bear and Her Three Cubs | Full Documentary

Nature Unfolded
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8 Video Views·Aug 31, 2026
In the Beaufort Sea, the solid ice a polar bear family was born on has shattered into drifting floes. To reach ice that still holds, a mother named Atka must lead her three four-month-old cubs across miles of freezing open water — and the smallest can barely stay afloat.
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These cubs were born to walk on ice. Right now three of them are trapped at the edge of black
open water and out of that water rise the tall black fins of killer whales. Their mother roars
them back from the edge into the middle of the flow and plants herself between her cubs and the
water. Because the solid ice they were born on has shattered into scattered flows with cold sea
between them. To reach real ice they'll have to swim it and the smallest can barely stay afloat.
On the ice ahead waits a huge male bear deadly to cubs and any day a storm can turn that black
wall into walls of ice cold waves. This is Atka and three cubs and the road that turned to sea.
For years this ice held solid all year round. Now it cracks apart and drifts
and between the pieces lies open water too wide to walk. Even the flow under Atka is crumbling
into the sea. She looks out past the black water to a thin white line on the horizon solid ice
far off. The cubs lean over the edge and meet their road for the first time. It's water.
Old Siku throws himself in chest first and swims strong. Steady Neela paddles evenly
right at her mother's flank but little Tunu thrashes sinking a little lower with every stroke.
Atka swings her broad back against him holding
and on the far side hauls him out by the scruff. Nearly half of all cubs don't survive these
forced swims. They drag out shivering soaked onto a scrap of ice and Tunu shakes hardest of all
his wet fur flat against his ribs. Far off a single black fin cuts the water.
There's no staying. She leads them back to the edge to swim again. They cross to the next flow
and the next swim climb out swim again. Every crossing Tunu falls further behind his chin
dipping under. They haul out shaking barely dry before the water calls again.
Then four black fins surface circling the open water. Atka drives the cubs back from the edge
and stands over them in the center while the fins circle the flow. The killer whales don't attack
but they've come to water that was never opened before and their presence alone pushes the family
off the sea. When they slide away she noses Tunu back toward the edge. On the next flow
waits a full-grown male 900 pounds and deadly to cubs. Atka backs water shoving the three behind
her chest then rears up out of the sea roaring in his face and turns and swims her cubs the other way
fast. They cross an immense stretch with no ice inside at all and a walrus erupts up in front of
them tusks streaming. Atka lunges snapping at the snout and drives him off. She hauls the cubs out
by their scruffs onto the ice. Ahead lies the widest gap yet to that thin white line of solid
ice. To the north a storm rolls in over the sea. Atka looks from that impossible distance down to
her weakest cub. There's no way around just black water all the way to the far eyes and the flow
under them is dissolving into the sea. So Atka slides in and the cubs follow into the longest
swim of all. Siku and Nila push on strong side by side but Tunu falls behind thrashing sinking
freezing and behind them the black fins rise again. Atka, Siku and Nila drive for the far ice with
everything left but Tunu tips his nose to the sky and his paws go still. The water is too wide
and too cold for the smallest. She treads the empty water alone spent the road that turned to sea
doesn't kill with teeth it kills with cold and distance and the black water closes over as if
nothing had been there at all. She pushes Siku and Nila up onto the solid ice the ice they swam
so far to reach and drags her own body out chest heaving then stands at the edge staring back at
the black water and the storm hits waves smashing the ice freezing spray in the wind. She herds the
two cubs behind a wall of ridged ice and covers their shivering bodies with her own. The killer
whales slip away into the storm all night the wind screams and the black waves batter the ice
and three white shapes hold together against the ridge the largest covering the two.
By dawn the sea finally calms they're on it at last solid old ice a piece of the road that still
holds. Atka licks the survivors dry warm and whole again here on ground that doesn't melt
she can finally hunt she lies by a seal's breathing hole and waits then strikes one
explosive blow into the ice and for the first time in the whole crossing they eat their fill
Siku and Nila fill back out striding strong across the ice. Nila keeps tight to her mother's leg
shoulder to shoulder their thick furs dry again doing what it was built for. Atka drops flat
beside another hole and Nila comes to watch and copies her exactly chin down still as the ice
the lesson passes on they walk on away from the open water deeper onto the solid ice
behind them the black sea took one ahead the white road that still holds. Siku strides bold at his
mother's flank everything the water tried to take back in him. Atka scans the ice unbroken to the
horizon and the three of them stand together shadows long in the light then she leads them
on toward the far ridges and the hunting beyond. Siku swats his sister loose and playful fully
recovered and Atka walks on never looking back the two hurry to her flank out across an endless
white plain under a pale clear sky three small white shapes crossing the last of the solid ice
they swam the road that turned to sea and while a piece of it still holds they walk it on
