By the obtained results, the local ichthyofauna includes 17 species of fish from 12 families. Fish population of the More-Yu River basin has 14 fish species and differs significantly in different parts of its middle and lower courses. Nine species have been found in different-type lakes in the More-Yu River basin. Among them, peled is a dominating fish species in the majority of lakes. Also popular are broad whitefish, grayling and pike (recorded in five of six lakes studied). The surveyed lakes and river parts differ by the relative fish density and diversity level. Strange is the absence of ide, roach, and perch in the More-Yu River basin. This situation seems to be related not to the climatic conditions but to the glacial history and the presence of watersheds with adjacent river basins.
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В. И. Пономарев (2023) studied this question.