Lake Invaders

There are more than 180 exotic species in the Great Lakes. Some have had little or no impact so far. But a handful of others - such as alewife, round goby, quagga mussel, Eurasian watermilfoil, spiny water flea, and rusty crayfish - have conducted an all-out assault on the Great Lakes and are winning the battle. In Lake Invaders, William Rapai focuses on the impact of these invasives.