Five species of parasitic copepods were collected near Unimak Island, Alaska in May 1999 from starry flounder (Platichthys stellatus (Pallas, 1788)) and northern rock sole (Lepidopsetta polyxystra Orr & Matarese, 2000). Parasites of starry flounder included Lepeophtheirus
parvicruris Fraser, 1920, Nectobrachia indivisa Fraser, 1920, and Acanthochondria rectangularis (Fraser, 1920), whereas Nectobrachia indivisa, Haemobaphes diceraus Wilson, 1917, and Acanthochondria sp. were found on northern rock sole. The distribution of L.
parvicruris was expanded approximately 2200 km, and the species was not known from Alaska previously. Lepidopsetta polyxystra was a new host for H. diceraus, and A. rectangularis was collected from Alaskan waters for the first time. Parasitism by more than one species
of parasitic copepod was found for one Platichthys stellatus (n = 3 spp.), two other P. stellatus (n = 2 spp.), and one Lepidopsetta polyxystra (n = 2 spp.). Taxonomic problems in the genus Acanthochondria and relevance of the host fish species and geographic location
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