The taimen (Hucho taimen), also known as Siberian taimen and Siberian salmon, is a species of fish in the salmon family (family Salmonidae) of order Salmoniformes.
- Series: Fish
- Country: Mongolia
- Year: 1965-11-25
- Emission: Commemorative
- Perforation: comb 11
- Printing: Photogravure
- Size: 43 x 43 mm
- Face value: 20 Mongolian möngö
- Number of catalogue Michel: MN 401