Invasive
Asian Clams Found in Lewis and Clark Lake (Jul
24, 2009) South Dakota Game, Fish and Parks.
Numerous
Asian clam shells have been found at Lewis
and Clark Lake, indicating a high likelihood
that the invasive species is established
there. Asian clams were earlier detected
in the Missouri River only below Gavins Point
Dam in Yankton, Clay and Union Counties as
shown in the Asian
Clam Distribution Map.