Lamprey

Sea Lamprey is an eel-like fish native to the U.S. Atlantic coast that is also now found in the Great Lakes.

One of the most destructive invasive species in North America's Great Lakes was also the first one to arrive. The sea lamprey invaded the Lakes more than a hundred years ago, and in all that time, no one's been able to get rid of it. It's the only invader in the Lakes that managers have been able to control, but it takes millions of taxpayers' dollars every year to keep the blood-sucking parasite in check.