Invasive Aquatic Species

Huge freighters unknowingly introduced zebra mussels to the Great Lakes by releasing ballast water filled with these tiny stowaways. These invasive bivalves quickly disrupted the local ecosystem, causing significant economic damage estimated between $300 to $500 million annually. The emergence of zebra mussels sparked a federal response to combat non-native aquatic species, leading to the development of a comprehensive database that tracks these organisms.