Steelhead trout is not as high in omega-3 fatty acid content as fish like mackerel or tuna, but it is less likely to contain contaminants. Per serving, steelhead trout is comparable in omega-3 fatty acid content to halibut, pollock and smelt. 1  Monterey Bay Aquarium Seafood Watch: Rainbow Trout.  USDA National Nutrient Database for Standard Reference: Nutrient Data for 15241, Fish, Trout, Rainbow, Farmed, Cooked, Dry Heat.
Ob River. Written By: Ob River, river of central Russia. One of the greatest rivers of Asia, the Ob flows north and west across western Siberia in a twisting diagonal from its sources in the Altai Mountains to its outlet through the Gulf of Ob into the Kara Sea of the Arctic Ocean.
The Ob-Irtysh is the world's seventh-longest river at 3,354 miles long. It begins at the junction of the Biya and Katun rivers, in the Altai Mountains, and flows through Siberia to the Gulf of Ob. It is made up of the Ob, the main river, and the Irtysh, its main tributary. Geographers most often refer to the two together, as the Ob-Irtysh River. Other large tributaries include the Tom, the Chulym, the Ket, the Tym, the Vakh, the Vasyugan, and the Sosva. But only the Irtysh, as the main tributary, gets its name in the title.