Have snakeheads been successfully introduced to places other than the United States?
Northern snakeheads were purposefully introduced and established into Japan in the early 1900s. They were introduced into parts of the former Soviet Union (Kazakhstan, Uzbekistan, Turkmenistan) when accidentally mixed with shipments of imported Asian carps. This fish also became established in Russia for a short time in the 1950s and was successfully introduced into Czechoslovakia. The blotched snakehead was successfully introduced into the Philippines and into Madagascar where it is now a major threat to many of the endemic cichlid fishes of that island nation. The chevron snakehead (Channa striata) was successfully introduced into the Philippines, is reported to be established in other Pacific islands, and is being cultured in Hawaii.
Learn more: Northern Snakehead (Channa argus) - FactSheet