Carp Cowboys: Protecting the Great Lakes, One Catch at a Time

Fighting Invasive Carp with Innovation, Collaboration, and Grit

In the rivers of Illinois, a dedicated team is on the front lines of one of North America’s most urgent aquatic battles — keeping invasive carp out of the Great Lakes. These fast-growing, filter-feeding fish pose a major threat to native species by dominating food sources and disrupting aquatic ecosystems. Their numbers can account for up to 80% of the biomass in some waters — a level that could devastate the $7 billion Great Lakes fishery if left unchecked.

Led by experts like Kevin Irons, recently retired Assistant Chief of Fisheries at the Illinois Department of Natural Resources, and supported by partners like the U.S. Army Corps of Engineers, the strategy combines non-structural methods, like commercial removal using nets and boats, with high-tech structural defenses, including electric barriers, bubble curtains, and sound deterrents. The team’s goal: reduce invasive carp populations and prevent their spread toward Lake Michigan.

At the heart of the operation are the so-called “carp cowboys,” local fishers who haul in nearly a million pounds of carp each year. Their work is loud, tough, and vital. It’s a race against time to protect one of the world’s most valuable freshwater resources, and it’s being won with science, grit, and regional cooperation.