True.

However the walleye and other fish populations did not decrease sharply as was originally feared. The walleye population doesn't seem to be greatly impacted by the mussels. The mussels are here to stay, at least for now. Many would say the benefits have out weighed the costs. Doesn't really matter, we have to deal with them until maybe at some time a viable means is found to get rid of them, but if it is should we do it?

Gobies and other invasive species are just as much a threat to native fish populations. If the "flying Carp" ever get into the Great Lakes look out. That could be a real disaster.