Freshwater fish are fishes that live at least part, if not all, of their lives in bodies of fresh water with a salinity of less than .05%. Forty-one percent of all known fish species are found in freshwater. This page provides a variety of resources pertaining to freshwater fishes. Please also visit:

	Live Maps & Data for mapping and database resources
	Recreation for information about the recreational aspects of freshwater fish, such as Fishing

Contrary to freshwater fish and saltwater fish, anadromous fish migrate between marine and freshwater. Many of these fish, such as salmon, reproduce in freshwater but spend the majority of their adult lives at sea. By associating different habitats with different stages of life, anadromous fish are able to balance salt concentrations between their bodies and their surrounding. The North Pacific Anadromous Fish Commission (NPAFC) was established to promote the conservation of anadromous fish in the North Pacific Ocean. NPAFC works with Canada, Japan, Repbublic of Korea, the Russian Federation, and the United States on a number of different research projects. They focus on seven different species of anadromous fish.