The macrozoobenthos structure in the rivers of the Kandalaksha coast of the White Sea and the forage base of juvenile salmonids are analyzed. 84 species (92 taxonomic groups) have been found, among which aquatic insect (Ephemeroptera, Trichoptera, and Diptera) larvae predominate. Scarce benthic communities in the mountain rivers (1.6 thousand ind./m2 and 2.4 g/m2) and relatively rich ones in the lowlands (10.3 thousand ind./m2 and 7.4 g/m2) were noted.