There is wide variety of fish that live in the St. Lawrence River and the Great Lakes.  The fish listed below link to popup windows that shows you a picture and lists some features of that specific fish.

Burbot, White Crappie, Goldeye, American Eel, Bowfin, Lake Sturgeon, Rainbow Smelt, Mooneye, Bluegill, Black Crappie, Pumpkinseed, Freshwater Drum, Channel Catfish, Redhorse Sucker, White Perch, Carp, White Sucker, White Bass, Lake Whitefish, Lake Trout, Brown Bullhead, Round Whitefish, Brown Trout, Lake Herring, Brook Trout, Rainbow Trout, Pink Salmon, Chinook Salmon, Atlantic Salmon, Rock Bass, Coho Salmon, Smallmouth Bass, Largemouth Bass, Sauger, Yellow Perch, Muskellunge, Walleye, Northern Pike.

The Fish Thermometer
The various fish in and around the St.Lawrence River have a preference for temperature.  Click to bring up the fish Thermometer scale.  You can see specific fish during the different temperatures of the river.

Great Lakes Fish Chart
A great little reference for some of the local fish courtesy University of Wisconsin Sea Grant