The UK’s favourite holiday hotspot, Cornwall, has been invaded by an unexpected species, causing a stir among tourists and locals. The invasion has been described as a ‘growing concern’ by local authorities, who are working to mitigate the impact on the environment and the local economy. The species in question is the non-native signal crayfish, which has been found in large numbers in the area’s waterways. The signal crayfish is native to North America and has been introduced to the UK through human activity, such as the pet trade. The species is known to be highly invasive and can cause significant damage to the local ecosystem. The invasion has been linked to the decline of native species, such as the white-clawed crayfish, which is found only in the UK. The white-clawed crayfish is considered an endangered species and is protected by law. The signal crayfish is also known to carry a disease that can be fatal to the native crayfish population. The disease, known as crayfish plague, has been found in several locations in Cornwall, further exacerbating the problem. Local authorities are working to contain the spread of the disease and prevent further invasions. This includes implementing measures to prevent the introduction of non-native species, such as checking boats and equipment for signs of the signal crayfish. The invasion has also raised concerns about the impact on the local economy, particularly the fishing industry. The signal crayfish can cause significant damage to fishing gear and equipment, resulting in financial losses for fishermen. Additionally, the invasion has also raised concerns about the impact on tourism, as the presence of non-native species can deter visitors. The local community is coming together to address the issue, with several organizations and individuals working to raise awareness and prevent further invasions. The invasion of the signal crayfish is not an isolated incident, with several other non-native species found in the area. The UK is considered a ‘hotspot’ for invasive species, with many non-native species found throughout the country. The problem is not limited to Cornwall, with other areas of the UK also affected. The invasion of non-native species is a complex issue, with many factors contributing to the problem. Climate change, human activity, and globalization have all been linked to the increase in invasive species. The UK government has implemented several measures to address the issue, including the creation of a non-native species secretariat. The secretariat is responsible for coordinating efforts to prevent the introduction and spread of non-native species. Despite these efforts, the problem persists, and more needs to be done to address the issue. The invasion of the signal crayfish in Cornwall is a wake-up call for the UK, highlighting the need for greater awareness and action to prevent the introduction and spread of non-native species. The local community, along with national and international organizations, must work together to address the issue and protect the UK’s unique and fragile ecosystem.