Invasive mussels in aquarium supplies alarm wildlife managers
Zebra mussels — fingernail-sized mollusks named for their striped shells — are benign in their native Black Sea and Caspian Sea ecosystems. But they are disastrous almost everywhere else. Since they were first discovered in the Great Lakes in 1986, these rapid-spawning animals have infested every watershed in the Lower 48 except the Columbia River Basin….The mussel found in [a pet store in] Seattle came from the California distributor….