A top-level predator, the voracious snakehead has no natural enemies outside of its natural, fresh-water habitat in Asia and Africa, and it is known to consume anything. The fish is often sold at Asian markets or kept as a pet, and biologists say the snakehead could have harmful effects on future fish populations. However, the containment of the fish is easier said than done. A snakehead can survive on land up to four days and, with the use of its fins, is able to crawl into different bodies of water. In the U.S., fisheries scientists have found four species of snakeheads in seven states.