The white sand beaches and emerald green waters of Destin, Florida are the setting for the World's Luckiest Fishing Villages. Beneath the water's surface, it's a different story.

The feral hog is one of the most formidable species on the planet. Possessing a unique combination of high reproductive capacity, size, and adaptability, the feral hog absolutely decimates entire ecosystems.

Dusty Wildman Crum makes it his mission to eradicate Burmese pythons, which alter the ecosystem of the Florida Everglades by eliminating over 99% of the native mammal population.

Green iguanas escape their terrariums in the '60s and find the Florida ecosystem to be a much more hospitable environment to call home.

Fishermen from the Ohio River Basin bring rusty crawfish up to Leech Lake as bait and release them after fishing, inadvertently giving them a new home; now, the rustys are pushing out the native crawfish, and destroying the weed beds other fish need.

Common carp are one of the most widely introduced species of fish in the world; most people in the U.S. won't eat them, referring to them as a trash fish; these fish are so plentiful, Curt runs a year-round full-time guiding service targeting them.