The American signal crayfish (Pacifastacus leniusculus) has become invasive in British lakes and rivers. It escaped from farms where it was (still is) being reared for people to eat. But the signal crayfish doesn’t seem so attractive when it multiplies out of control, causing damage as it’s damaging biodiversity in Loch Ken.
We want to control this invasive animal. To eliminate it except when it’s in a tank. Science is happening about how to control the signal crayfish but no control method has yet been found really to work.
Our native European eel (Anguilla anguilla) likes to eat signal crayfish and so do I. Here are some crayfish recipes. But if you care about Loch Ken and other British waters, you’ll want a more effective solution than a bit of cookery.
[Edit] A company called Continental Crayfish offers to remove signal crayfish ‘from still waters, rivers, fisheries and gravel pits’. I like these people’s attitude and their recipes look delicious.