These invasive creatures can be spread on purpose by people putting fish into their local waters or accidentally by not cleaning their boats, boots, or waders and transferring them from one body of water to another.
Another issue has been the spread of non-native aquatic plants. These plants can get into our lakes and rivers and choke out the native plants, having a negative impact on these waters. I know people don't think about these things, but we need to change our thinking to preserve our beloved bass, muskie and other North American fish species for future generations.
"If it's good for the fish, it's good for the angler!"