The number of domestic fish stocks listed as overfished has reached an all-time low, with three species of West Coast rockfish rebuilt to sustainable levels, according to the 2017 Status of U.S. Fisheries report to Congress. The number of stocks on the overfishing list also remained near all-time lows, an encouraging indicator that the U.S. fishery management system is achieving its long-term sustainability goals. A biological fish stock is a group of fish of the same species that live in the same geographic area and mix enough to breed with each other when mature. A management stock may refer to a biological stock, or a multispecies complex that is managed as a single unit.