Remember that not all of our exotics come through the Great Lakes. We need to watch our western backside as well.
California closes trophy trout stream to control mud snail
SACRAMENTO, Calif. - State regulators closed one of Northern California's prime trophy trout streams to fishing Tuesday, as the state tries to halt the spread of a tiny foreign snail to other waterways
The snail rarely grows larger than 5 millimeters in length, but can reach concentrations of 700,000 per square meter, driving out much of the native invertebrate population on which fish feed.