Kingdom of fish ep 2 of 3-The lake

The Lake
Swedes love their lakes, and have hundreds of thousands to choose from for relaxation. But few people have visited below the surface. Here the voracious pike rules the ecosystem. The fastest predator of the north, it attacks at the speed of a cheetah.
Lakes are merely places where water rests for while, during its endless cycle. Treating lakes as separate units has led to a disconnection. The threatened European eel, once ubiquitous in inland Sweden, can no longer reach its feeding grounds in the lakes. Nor can it escape the lakes and reach the Sargasso sea to spawn.