The Ob is one of the largest rivers in the world. It originates at the confluence of Biya and Katun. The length of the Ob is 3650 km, its catchment area is 2 990 000 km². The Russians first saw the river when hunters and merchants, along with Zyrian guides, walked beyond the Ural Mountains. And before the conquest of Siberia by Yermak of Siberia, the edge around Ob was called Obdorsky. As early as 1187, the lower Ob was part of the "volosts nationals" of Veliky Novgorod, and after its fall it passed to the Moscow princes, who from 1502 began to add the words "Obdorsk and Ugra" to their titles. In 1844 a shipping company was launched on the Ob; the first ship was operated by Commerce advisor N. F. Myasnikov. In 1895, there were already 120 steamboats that made flights along the Ob and its tributaries; most of them belonged to private owners. Since 1923, the transportation of passengers and cargo along the Ob has been carried out by the West Siberian Shipping Company. The origin of the name of the river is not known for certain. According to one version, it comes from a word in the Komi language, which meant "snow", "snow drift", "place in the snow." According to Wolfgang Steinitz and Alfred Dulzon, the name is associated with the Komi-Zyryan word obv - “snowy water”, as the Russians recognized the Ob in its lower reaches, and received its name from the Komi guides. There is also an assumption that the name of the river is of Iranian origin, from the an "water" (taj. About). Steppe Iranian-speaking peoples who lived in the south of Western Siberia in the period from the early Bronze Age to the Middle Ages could have given such a name of the full-flowing river. Long since on the Ob was developed fishing. Currently, about 50 species and subspecies of fish inhabit the waters of the Ob and Gulf of Ob, half of them have industrial value. The most valuable species are: sturgeon, sterlet, nelma, muksun, chir, tugun, whitefish, peled. The objects of fishing are mainly small-sized ones - zander, pike, ide, burbot, bream, dace, roach, crucian carp, perch.