Hucho is a genus of salmonids

Salmonidae

Salmonidae is a family of ray-finned fish, the only living family currently placed in the order Salmoniformes. It includes salmon, trout, chars, freshwater whitefishes and graylings...

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There are five species in the genus Hucho, and all are native exclusively to Asia with the exception of Hucho hucho

Huchen

The huchen or Danube salmon is a species of freshwater fish in the salmon family of order Salmoniformes. It is the type species of its genus...

, the Huchen trout or the Danube salmon, and Hucho taimen

Hucho taimen

The taimen , also known as Siberian taimen and Siberian salmon, is a species of fish in the salmon family of order Salmoniformes.-Habits and range:...

the taimen. Hucho taimen is extinct from Europe and now only lives in Mongolia and Russia. Hucho bleekeri the Sichuan taimen , Hucho ishikawae the Korean taimen and Hucho perryi

Hucho perryi

The Sakhalin taimen , also called the Sea-run taimen, Stringfish, Japanese huchen, or Ito, is a species of fish in the salmon family of order Salmoniformes.-Description:...

the Sakhalin taimen or the Sea-run taimen live throughout Asia to Japan.