Specialists of the fish products technology sector of the Tyumen branch of the State Research Center of the Russian Federation "All-Russian Research Institute of Fisheries and Oceanography" (VNIRO) conducted experimental and control work to determine the yield standards for smoked fish products at the largest fish processing enterprise of the Khanty-Mansiysk Autonomous Okrug - Yugra "Nizhnevartovsk fish canning plant "Santa Maria".

From April 9 to April 26, specialists from the Northern Branch of the Russian State Research Center “All-Russian Research Institute of Fisheries and Oceanography” (VNIRO) conducted annual monitoring studies of the White Sea herring in the Chupa Bay of the Kandalaksha Gulf of the White Sea. Scientific fishing was carried out during the spawning ban.

In May, industrial fishing of gastropods (whelks) traditionally begins in the north of the Sea of ​​Okhotsk, since the most productive whelk fishing area in the waters of the Russian Far East is located here.

Spring grading of broodstock stocks of whitefish species has begun at the production sites of the Tyumen branch of the Russian State Research Center of Fisheries and Oceanography (VNIRO).

On April 9, public discussions were held at the Pskov branch of the Russian State Research Center of Fisheries and Oceanography (VNIRO) in the form of hearings on the documentation: "Materials substantiating the total allowable catch (TAC) of aquatic biological resources in Lake Peipus and other (small) water bodies of the Pskov Region for 2026 (including environmental impact assessment)".

In 2024, the Sakhalin branch of the Russian State Research Center “All-Russian Research Institute of Fisheries and Oceanography” (VNIRO) received unmanned aerial vehicles (UAVs) from a domestic manufacturer: the Geoscan 801 quadcopter, manufactured by the Geoscan group of companies, and one of the flagships among aircraft-type unmanned aerial systems, the Supercam S350F from the Unmanned Systems group of companies.

On April 9, the III International Scientific and Practical Conference "Fisheries Science in the 21st Century: Key Development Directions" was held at SberUniversity.

In late March and early April 2025, specialists from the fish reproduction laboratory of the Volga-Caspian branch of the Russian State Research Center “All-Russian Research Institute of Fisheries and Oceanography” (VNIRO) visited individual water bodies that are poorly flooded at this time of year and serve as spawning grounds for early spawning fish species - pike, perch, pike perch, and crucian carp.

On April 7, in order to compensate for the damage to the aquatic biological resources caused by the economic activities of enterprises, juvenile Atlantic salmon grown at the Nevsky Fish Hatchery were released into the Neva River.

By mid-March, the water bodies of the Astrakhan region were free of ice, and amateur fishermen went fishing. A mass arrival of amateur fishermen who arrived at the water bodies of the region from other regions of Russia was noted already in the third decade of March.