A list of freshwater, anadromous, and euryhaline fishes of California

The freshwater fishes of California include 67 native resident or anadromou s species, 53 non-native species, and 5 marine species that occur in fresh water, for a total of 125 species. Within these species, inn tars at lower levels (subspecies, Evolutionary Significant Units, runs of anadromous fish ) are recognized. The number of freshwater fish species in California is in creasing due to invasions of non-native fishes, which are becoming establis hed at a rate of about 1 species every 3 years. Of the native fishes, 5 ful l species are extinct in California. Thus, the actual number of species mai ntaining populations in the state is 120. Of extant native species, 15 (22% ) are threatened with extinction in the near future. Only 27 native species (40%) can be regarded as having secure populations.