The Niagara River is an important overwintering habitat for various duck species including the canvasback. Fish gills take oxygen from the water as it passes over the gills. To give information on which species of sport fish are unsafe to eat. Fish are exposed to contaminants in their habitats and in their food. In general, larger fish have been exposed to more contaminants and their consumption may be restricted.
Wetlands are the most productive aquatic habitats.
They provide habitat for fish, birds, mammals, amphibians and reptiles. You cannot sell sport fish. Fish in the grocery store or a restaurant are called commercial fish. They have been caught with a net or raised on a farm. Small organisms living on the bottom of a lake or river.