The government district in Berlin is under siege by strange creatures - not politicians, but red swamp crayfish native to the southern United States.

Exotic Louisiana crawfish infest Berlin park

E4y.net

Procambarus clarkii, as they are properly known, are believed to have spread to Berlin’s Tiergarten park when they were released from local acquariums.

The freshwater crabs – which are considered pests outside of their natural habitat – can devastate domestic fish tanks by eating all of the plants.

Individual red swamp crayfish dumped outside the park appear to have gathered and bred.

A tourist holds a Louisiana crawfish, or Procambarus clarkii, in Berlin's Tiergarten park
Image:A tourist holds a Louisiana crawfish, or Procambarus clarkii, in Berlin’s Tiergarten park

Heavy rainfall in recent weeks may have altered the water balance or drowned the caverns in which the crawfish were living in Berlin.

The crabs are a famous part of Louisiana cuisine, with the crawfish boiled with lemon, spices and vegetables.

Strict poaching laws in Germany make it a criminal offence for Berliners to catch the crawfish and cook them – so officials are hoping foxes and raccoons will devour them instead.

“We are focusing on the natural enemies of the crabs,” said a city official.

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