(JAMESTOWN, ND) KFGO NEWS -- The North Dakota Game & Fish Department is keeping a close eye on the James River south of Jamestown after more Silver Carp were discovered.
Game & Fish employees caught several earlier this month.
The department's aquatic nuisance species coordinator Fred Rykman says the the nuisance species, once established are virtually impossible to eliminate.
Rykman says the big question is whether the Silver Carp are spawning in North Dakota waters.
First confirmed in stretches of the James River near Lamoure two years ago, the leaping carp are considered a threat to fish and other marine life because they attack the aquatic food chain and have been known to injure boaters.
Biologists believe high flows in the James River in South Dakota allowed the carp to move upstream.