They have, but not as much as the round goby. The round goby is prolific. It started on the nearshore, but you find now it's in deep water as well. If you looked at bass, whitefish, lake trout, walleye, if you were to open up the stomach of a lake trout, 65% of what you would find in the stomach would be round goby.
The cisco are there, and they're coming back, but the round goby has become this amazing fish. I don't know if you've seen them, but they're really ugly. They grow four inches long. You wouldn't want to eat them. This is what they're finding. They look in the stomach and they find the round goby.