The snakehead fish was first discovered in Maryland in 2002. It is a big predatory Asian fish that has slowly had a huge impact on native fish species and is taking over American waterways. The invasive snakehead fish has established itself firmly in the Potomac River system and is rapidly spreading. In 2017, the snakehead fish was found in the waters of the State of Mississippi. These prolific fish reproduce twice a year and both parents heavily guard the eggs ensuring a high rate of survival. The snakehead fish has a very diverse diet ranging from other aquatic life to invertebrates to small fowl and mammals. Once snakeheads mature, they are usually not subject to other predators; and their young are so heavily guarded that other predators only have a small impact on the snakehead population. Even large snakeheads are not usually a significant threat to humans, but they can be difficult to handle if encountered in the wild. These fish get so large that the only real threat to them are humans. These odd fish have an organ that lets them breathe out of water for a limited time. In Asia, they do well in rice paddies that have fluctuating levels of water ranging from the fish being completely submerged to there being no water at all. The snakehead has been known to survive 3 or more days out of water in a cool, moist environment. They have also been known to be able to move a short distance across land and are sometimes called the "walking fish". At this time, the only real way to control the population of snakehead fish is commercial and recreational harvest.