Klaus Hidde: the man who saved Berlin from swamp cancer - WELT

Wa likely everything started with humans, says Klaus Hidde (67), while the darkness envelops the lake. People bought the swamp crab for the aquarium because of its glowing red shell and wondered if the crab grew and snapped your fingers bloodied, so he abandoned it. Scientists explain it similarly.

When the politicians, administrators and nature conservationists no longer knew how to prevent the swamp crab from rising to rulership of Germany's lakes, lord of life and death, they gave it up to hunt. In Berlin, Hidde applied for the fishing rights, so he became the only fisherman in the city who is allowed to catch the crayfish. That went well for a long time - for both of them. But now there is a problem.