"All you could see were spots bobbing all over the water as far as you can see, and we went up to them and saw big catfish with really huge big bellies, and perch, walleye, rock bass and carp," McBain said. "It was gross." Other residents found dead fish washed up on the shoreline, she said. Several residents of Cumberland and nearby Rockland, Ont., called the Ottawa Riverkeeper's pollution hotline Monday to report the die-off.