Europe Fights Invasive Self-Cloning Crayfish

European conservationists are urgently working to eradicate newly discovered populations of self-cloning marbled crayfish in the Czech Republic's waterways. This rapid response is a key component of a European Union initiative aimed at eliminating invasive alien species while their numbers are still small and manageable.

The Nature Conservation Agency of the Czech Republic is leading this local project, focusing on two recently identified groups of marbled crayfish. Uniquely, these crayfish reproduce through parthenogenesis, meaning a single female can produce genetically identical offspring without mating, allowing for rapid population growth. They also carry a devastating fungal disease known as crayfish plague, which has severely impacted native European crayfish.

This Czech project is among the initial twenty receiving support from the European Invasive Alien Species Rapid-Response Fund. This fund, co-financed by the EU and managed by IUCN Save Our Species, provides grants to enable swift action against newly discovered invasive species. The European Environment Agency highlighted in June 2026 that non-native species continue to spread, stressing that early detection and rapid removal are the most effective methods to prevent long-term environmental damage, estimated to cost billions annually across Europe.

Historically, conservation funding often focused on controlling widespread invasive species, a stage where removal becomes extremely challenging and costly. The Convention on Biological Diversity has also released a toolkit to assist countries in developing monitoring systems and rapid eradication plans. The current round of funding supports diverse projects across nine European countries, including efforts against lionfish in Croatia and invasive frogs in Belgium, demonstrating a continent-wide commitment to biodiversity protection.