- [Narrator] The land may freeze over, but the sea doesn't.
Herring, they come to wait out the winter months in huge numbers, and hunters follow.
Orca, the wolves of the sea.
Winter's return marks the start of a great feast.
They follow the herring into shallow waters.
And with so many fish around, picking them off is easy for a pod that knows how.
Orcas here have a special way of catching herring.
A quick turn of speed and their powerful tails send shockwaves through the water, stunning the fish.
Shoals this big make it hard to miss.
(birds cawing) It's not just orcas that take advantage of the feast.
They can swallow hundreds of fish in single, giant mouthful.
With billions of herring gathered here, this spectacle will last all through the long winter.