An American eel1 A blue sucker, captured for a pilot study in the Lower Colorado River, Texas2 Smallmouth bass with internal radio transmitter from the Grand River, near Conestogo, Ontario3 Smallmouth bass with internal radio tag released into the Grand River, Conestogo, Ontario4 Tracking greater redhorse on the Grand River, Kitchener, Ontario5 Tracking smallmouth bass in the Grand River, Kitchener, Ontario6 American Eel with external sonic tag, St. Lawrence River, Ontario7