An invasive species refers to any non-native organism that, upon introduction to a new ecosystem, experiences rapid proliferation and causes ecological or economic harm. These species disrupt the established biological community structure by outcompeting native flora and fauna for resources, introducing novel forms of predation, or transmitting pathogens to which local species have no immunity. The establishment and spread of such species can fundamentally alter nutrient cycling, modify physical habitats, and destabilize trophic relationships. Managing invasive species involves complex scientific strategies aimed at prevention, early detection, and mitigation of their ecological impact.