hairtail
  帶魚
  Hair·tail n. Zool. Any species of marine fishes of the genus Trichiurus; esp., Trichiurus lepturus of Europe and America.  They are long and like a band, with a slender, pointed tail. Called also bladefish.
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  hairtail
       n : long-bodied marine fishes having a long whiplike scaleless
           body and sharp teeth; closely related to snake mackerel
           [syn: cutlassfish, frost fish]