Zebra mussel tops list of invasives

Researchers have revealed the Great Lakes’ 10 worst aquatic invasive species, spotlighting the plants and animals that pose the greatest threat to the region’s delicate ecosystems, fisheries and recreational waters.

Their recent study in the Journal of Great Lakes Research is the first to compare all 188 nonnative species in the lakes with the same methods and pinpoint which are causing the most harm, its authors said.

At the top of the list is the zebra mussel.