They’re a problem, but they’re also dinner.

ASIAN CARP ARE BIG FISH: big in size, and big in numbers. Originally imported to the American south in the 1970s as cleaners of ponds and wastewater facilities, they escaped into the Mississippi River and now clog waterways across the United States. Easily startled by motors, they have been known to jump into boats, causing broken noses and black eyes for unwary fishermen. Some carp can weigh a hundred pounds.

Source: The Chef Cooking Up Giant Carp, 20-Pound Rats, and Other Invasive Species