We are blessed with some of the largest and most unique freshwater lakes on earth and we've treated them like crap. The man made canal the grass carp are in near Chicago was orginally designed to flush raw sewage into Lake Michigan. I think we are now up to exotic species number 190 now in the Great Lakes, or something like that, which of course now includes the Asian Tapeworm and other nasty parasites.
I can imagine what they must have looked like and the immense natural fisheries they had 300 years ago. One of the French Explorers commented in his journal on the abundant lake trout in the four feet category in shallow water during I believe it was the fall.
Time to find another planet...I think JHAP is already orbiting one now. Any signs of carbon based life, JHAP?