bow·fin /ˈboˌfɪn/
  北美產淡水魚的一種
  Bow·fin n. Zool. A voracious ganoid fish (Amia calva) found in the fresh waters of the United States; the mudfish; -- called also Johnny Grindle, and dogfish.
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  bowfin
       n : primitive long-bodies carnivorous freshwater fish with a
           very long dorsal fin; found in sluggish waters of North
           America [syn: grindle, dogfish, Amia calva]