The ayu sweetfish, Plecoglossus altivelis, is an amphidromous fish. Native to the Palearctic ecozone, it occurs in rivers, lakes, and coastal waters of western HokkaidÅ in Japan southward to the Korean Peninsula, China, Taiwan and Hong Kong.
The ayu sweetfish, Plecoglossus altivelis, is an amphidromous fish. Native to the Palearctic ecozone, it occurs in rivers, lakes, and coastal waters of western HokkaidÅ in Japan southward to the Korean Peninsula, China, Taiwan and Hong Kong.