The paper proposes a unified approach to ichthyologic expertise of Pacific salmon and products of them. Criteria identification of Pacific salmon and their caviar, both fresh and after technological processing to species are presented. A standard form of expert conclusion after the ichthyologic expertise is proposed. The algorithm for assessment of losses for the Pacific salmon stocks as a result of illegal fishing (catch), taking into account the associated factors – passing days (hours, periods), prohibited areas for fishing, in provided.

The article characterizes Pacific halibut fishery in the waters off Kamchatka according to the stock units of the Kamchatka-Kuril, West Kamchatka, Petropavlovsk-Komandorskaya, Karaginskaya subzones and West Bering Sea zone. Some data on fishery of this species in other areas of the Far Eastern seas are given. A brief history of the development of the fishery is presented, the dynamics of the total allowable catch (TAC) and harvest, the inter-annual variability of the catches by fishing gears, the effort and catch per unit effort for the major fishing gears, and the seasonal dynamics of the catches in the main types of fisheries are considered.

The data on catch dynamics and structure of saffron cod fishery off the southeast coast of Sakhalin Island from 1946 to 2023 are presented. The catch of saffron cod during these years ranged from 0.01 to 13.83 thous. t, and averaged 4.91 thous. t. It is shown that the main fishery is concentrated in Terpeniya Bay and was carried out using twin trawls on spawning aggregations in January. In the post spawning and feeding aggregations, fishing was conducted with saffron cod traps (fyke nets) in the area of the Capes Tikhii and Senyavina in February–March. Amateur fishermen predominantly fished for saffron cod in the same area. Over the long period of exploitation the structure of catches has undergone noticeable changes: before 1970, fishing was carried out exclusively with the use of tyke nets, since the early 1970s the basis of catches is provided by trawl fishing, since the early 2010s, along with industrial development, the volume of catches by recreational fishermen has been increasing. In the last decade, the ratio between catches of commercial fleet, fyke nets and recreational fishery was 89%, 6% and 5%, respectively.

In 2024, data on the species composition and quantitative characteristics of the HAB microalgae complex were obtained not only from standard transects in the Avachinsky Gulf, but also from the bays in the southern part of the transect and from recreational waters, including in vicinity of historical and expected tourist cluster of Petropavlovsk-Kamchatsky. The studies on identification of normative concentrations of the HAB microalgae complex should be continued, including phycotoxin studies both in microalgae samples from Avacha Bay and in hydrobionts. A complex of hydrological data was obtained to describe habitat specifics in examined area during the period of research.

New data on the Fedorovʼs eelpout Lycenchelys fedorovi near the Kuril Islands are presented. It has been established that the species is one of bycatch species on the bottom trawling fishery in the Pacific waters off the Ketoy and Simushir islands. The eelpout was found at the depth range of 300–515 m at the water temperature near the bottom of 1.8–3.0 °C. The catches of this species in examined area evidence in favor of wider geographical distribution along the Kuril Islands.