Giant African land snails, like this one found in Florida in 2011, eat almost any plant. Florida officials are determined to eradicate the invasive pest. Andrew Derksen/Florida Department of Agriculture/Reuters/Landov hide caption

itoggle caption Andrew Derksen/Florida Department of Agriculture/Reuters/Landov

Asian carp, battered and fried. As the fish makes its unwelcome way up the Mississippi River, chefs are trying to get people to eat to beat it back. Louisiana Sea Grant/Flickr hide caption

itoggle caption Louisiana Sea Grant/Flickr

Commercial fisherman Ronnie Hopkins (left) and his assistant, Armondo, catch Asian carp on Lake Barkley, Ky. Paul Rister/AP hide caption

itoggle caption Paul Rister/AP

A Russian sow on Mark Baker's farm. Four other parties have joined Baker's lawsuit against the Michigan Department of Natural Resources. Courtesy of Long Haul Productions hide caption

itoggle caption Courtesy of Long Haul Productions