They are smaller than a finger nail, but have caused hundreds of millions of dollars in damage across the country. Idaho is continuing its unprecedented battle to stop quagga mussels from spreading in ...

Idaho state officials this fall plan to continue efforts to eradicate quagga mussels, an invasive species threating the state's ecosystem, with another round of chemical treatments in the Snake River.

BOISE, Idaho — They are smaller than a finger nail, but have caused hundreds of millions of dollars in damage across the country. Idaho is continuing its unprecedented battle to stop quagga mussels ...