Sterile grass carp were introduced into Smith Mountain Lake in 2013 to eat invasive aquatic vegetation. Now reaching the end ...

A planned lock and dam system there would include an electric barrier, unappealing sounds for fish and gates of bubbles as ...

unappealing sounds for fish and gates of bubbles as deterrents — all designed to deter invasive bighead, silver, black and grass carp from entering the Great Lakes. The carp were imported from ...

unappealing sounds for fish and gates of bubbles as deterrents — all designed to deter invasive bighead, silver, black and grass carp from entering the Great Lakes. U.S. Fish and Wildlife ...