Abstract
This article presents the results of studies of the ichthyofauna of Lake Zerendinskoe in 2020. The ichthyofauna of Lake Zerendinskoe is represented by 7 commercial fish species. The age range of the studied species varied from 2+ to 9+. The biological parameters of bream, carp, common pike, whitefish and common perch varied within the average limits. According to the biological indicators of roach, there is a slightly slowed growth. When studying the sex ratio, there is a predominance of females. The state of the ichthyofauna is considered stable and it is recommended to conduct both sports and amateur, and reclamation fishing, and fishing for reproductive purposes.