The main locations of concentrations of Pacific salmon in Russian waters can be divided into several groups that differ in species composition, biomass quantity of s almon and duration of the period of their elevated concentrations. Thus, chum and sockeye salmon dominate in the deep water area of the Bering Sea, while pink and chum salmon dominate the rest of species in the deep water area of Sea of Okhotsk. The Northern Kuril straits are the main migration corridor for spawning schools of the Western Kamchatka sockeye, coho, chinook, chum, and pink salmon fingerlings migrating into the ocean. The Kuril waters and the Sea of Okhotsk are dominated by pink and chum salmon. Northern deep water areas of the Sea of Japan as well as the Kuril waters serve as transit zones for the Western Kamchatka salmon migrations: masu and pink salmon spawn in April and July, autumn chum spawn October–December, while masu and pink salmon juveniles grow through the fall and winter. In the offshore areas of the Far Eastern seas, significant salmon concen-trations are observed only when the sire approaches to spawn and during the redistribution of juveniles that migrated down into open waters. This period lasts from June to September ( Temnykh, 2004).