So, there is a pond near me in CT, where the bass fishing was incredible for years. Then millfoil took over. And I’m not talking about MOST of the lake. I’m talking ALL. All the edges, even in the middle. I’ve fished the entire lake (it’s small) and not found a single spot without mill foil and hydrilla. It’s so bad you can’t even stick your hand through it. Even tying a massive 5oz saltwater sinker and trying to drop it through does nothing. Lo’ and behold, the fishing there is terrible now. My thoughts were exactly what that biologist said. There used to be specific sandy/rocky bottom spots they would spawn in that lake. They are now overgrown and there are no fish in those spots spawning. They’ve been pushed back into this one cove area that is about one foot deep at the deepest, and that cove gets INSANE wind, so the eggs can’t hold their ground. Bad situation.