Experimental work was carried out to find out the timing of the fertility preservation for eggs remaining in the body cavity of the North Sea Alaska Pollock females after spawning, as well as the possibility of their normal course of embryogenesis. It was established that eggs remaining after spawning in the pollock female body cavity are not resorbed simultaneously. 2 months after mass spawning, 2.7 % of them still retain fertility, and, with artificial insemination, they are characterized by high survival, suffering no violations during embryogenesis. Data on the embryonic development of the species, the timing of the steps and main stages of embryogenesis, and the amount of heat required to achieve them are given. It is shown that pollock eggs and pre-larvae from residual fertility are significantly smaller in metric parameters than those from natural spawning, but morphologically are identical to them. Regional features of morphometric indicators for eggs and newly hatched pollock larvae in the northern part of the Sea of Okhotsk were revealed.

The material for research was a collected fish in the littoral and sublittoral zones of the Islands of Nedorazumeniya and Zavyalov coasts (Northern part of the sea of Okhotsk) in June 2018 and August 2019.The authors’ research identified 22 and 25 species of fish that live in the summer in the littoral and sublittoral zones of the sea coast of Zavyalov and Nedorazumeniya Islands, respectively. Of these the most numerous are the Blue rockfish Sebastes glaucus (24.5-49.0%), and White spotted greenling Hexagrammos stelleri (13.5-35.7%). Most species are demersal and benthic ichthyocoen. 41% of the species are characterized by the broad-boreal near-Asian type of range, 28% - mainly boreal, 13% - Arctic-boreal, 9% - high-boreal near-Asian and broad-boreal Pacific. For the development of recreational fishing, 15 species of fish can be promising, for which size and weight indicators are given.

Species composition in catches of the ichthyoplankton survey conducted on June 4, 2021 in the periphery of the Tauiskaya Guba Bay (northern Okhotsk Sea) is considered. Eggs of 3 fish species were collected, the portion of alaska place was 1.3 %. Specific pigmentation of the alaska place embryos was defined that allowed to identify reliably the eggs of this species, in combination with other signs.