The Taimen is a species of fish in the salmon family of order Salmoniformes. The maximum size is not assured, but supposedly a fish caught in the Kotui River in Russia in 1943 with a length of 210 cm (83 in) and a weight of 105 kg (231 lb) is the largest size recorded (Holcik et al. 1988). Today the maximum length is approximately 150 to 180 cm (59 to 71 inches). The IGFA world record is 92.5 lb or 41.95 kg with a length of 156 cm. It can reach at least 55 years of age.
Coloration varies geographically, but is generally olive green on the head blending to reddish brown in the tail. Adipose, anal, and caudal fins are often dark red. The belly ranges from nearly white to dark gray. The Taimen is one of the largest salmonids in the world. Most mature fish caught weigh from 15 to 30 kg (33 to 66 lb). The average length is from 70 to 120 cm (28 to 47 inches).
When not devouring their prey, Taimen attack dry flies. Taimen should be fished with 8 or 9 weights. For the Taimen, you should fish with both double-handed and single-handed rods. The fish lay in riffles and in deeper runs. Almost all of the Taimen are caught on the surface, but, when the fish are harder to catch, you should go after them with streamers and sinking lines. Once hooked, the bigger fish will jump completely out of the water before bull dogging their way back to their den.
The Taimen is distributed from the Volga and Pechora River basins east to the Yana River in the north and that of the Amur River in the south. On a larger scale, this includes parts of the Caspian and Arctic drainages in Eurasia and portions of the Pacific drainage in Mongolia and Russia. In Mongolia the Taimen is found in both the Arctic and Pacific drainages, specifically the Yenisei/Selenga, the Lena, and the Amur River Basins. The Taimen lives in flowing water and is only occasionally found in lakes, usually near the mouth of a tributary.