ThepresentpaperreportsthespeciescompositionandquantitativedistributionoftheEuphausiacea.ThematerialsforstudyweretakenfromthewesternTaiwanStrait(22°22.9′~25°43.0′N;116°40.0′~120°30.0′E)bytheThirdInstituteofOceanography,StateOceanicAdministrationduringtheinvestigationsinMay,August,November,1984andFebruary,1985.