<P> Snakeheads became a national news topic in the United States because of the appearance of Channa argus , commonly known as northern snakeheads , spawning in a Crofton , Maryland , pond in 2002 . Northern snakeheads became permanently established in the Potomac River around 2004 ; and possibly established in Florida . in approximately 120 miles ( 190 km ) of river , the population has surpassed 21,000 individuals . </P>
<P> Snakeheads became a national news topic in the United States because of the appearance of Channa argus , commonly known as northern snakeheads , spawning in a Crofton , Maryland , pond in 2002 . Northern snakeheads became permanently established in the Potomac River around 2004 ; and possibly established in Florida . in approximately 120 miles ( 190 km ) of river , the population has surpassed 21,000 individuals . </P>
when did the snakehead fish arrive in the us
when did the snakehead fish arrive in the us
2002
2002