AbstractThe material was sampled from the areas of Vancouver Island and Kodiak Island. A total of 38 specimens of Atheresthes stomias was examined. The parasite fauna of the fish studied consisted of 18 species assigned to different systematic groups (Myxidium incurvatum The lohan, 1892; Paramyxoproteus reinhardti Wierzbicka, 1986; Ceratomyxa ramosa Awerinzew, 1907; Kudoa sp.; Entobdella pugetensis Robinson, 1961; Neodiclidophora pugetensis (Robinson, 1961); Bothriocephalus sp.; Nybelinia surmenicola Okada in Dollfus, 1929; Scolex pleuronectis O.F. Müller, 1788; Steganoderma formosum Stafford, 1904; Lecithaster gibbosus (Rudolphi, 1802); Podocotyle sp.; Anisakis simplex (Rudolphi, 1809); Pseudoterranova decipiens (Krabbe, 1878); Hysterothylacium aduncum (Rudolphi, 1802); Echinorhynchus gadi Zoega in O.F. Müller, 1776; Corynosoma strumosum (Rudolphi, 1802); and C. villosum Van Cleave, 1953). The muscles were parasitized by nematodes A. simplex and P. decipiens and myxozoans Kudoa sp. The latter parasite caused changes in the texture of muscles. A. stomias was found to be a new host for M. incurvatum, P. reinhardti, C. ramosa, Bothriocephalus sp. and Podocotyle sp.