Overview

• Chinese mitten crab numbers in the Elbe River have fallen by approximately 90% compared to previous years, with the Weser River seeing a 30-50% decline.
• The remaining crabs in the Elbe are reportedly weaker, with softer shells and higher mortality rates.
• Fishermen, who previously profited from harvesting the crabs, report that the current catch levels are too low to sustain their businesses.
• While invasive, the species has taken on ecological roles, such as serving as food for endangered birds like the common tern in the Elbe estuary.
• Conservation experts suggest the decline might not be detrimental, as the species is invasive and has historically caused ecological disruptions.