Great Lakes Now

Great Lakes most unwanted: Top 10 invasive species

13 min read

Great Lakes most unwanted: Top 10 invasive species

Long after the Halloween season has ended, some of the Great Lakes’ most infamous invasive species remain a scary sight: blood-sucking parasites with suction-cup mouths, thousands of rotting fish carcasses washed ashore and sharp mussel shells that puncture the feet of unsuspecting beachgoers.

At least 188 nonnative aquatic species have been introduced to the Great Lakes, and over a third have become invasive, meaning they can have negative health, ecological and socioeconomic impacts when introduced to new ecosystems.

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